Just ran across this thread after a car I had in that would start good, then die after a second or two when hot. FSM Manuals Jeep Manuals. Make sure you are using proper wiring practices. Fuel Prime Multiplier is primarily a benefit to throttle-body based EFI systems. We can adjust that with the after-Start enrichmentIll bump that up a bit. My car is going on the dyno for final tuning next week. Can I use this for the return.Thanks for the help, I have a aeromotive stealth 340 fuel tank. The xflow instructions state it needs 60 psi. Quick Start Tuning. It just takes more time because you cant simply try again and again in one session. You mentioned its use in # 9 of the top 10 Sniper EFI installation tips. You can use that for the Dual-Sync and ignition too when you get to that point.Running the O2 sensor on a single side of the dual exhaust works fine. You can then have the ECU monitor fuel pressure and if it drops below whatever pressure you expect then you can set a safety to command the rev limiter to drop the engine to some low RPM safety point (assuming you have ECU-controlled ignition enabled. The way you write makes it so easy to understand. For TWO YEARS Since installing my Sniper Stealth 4150 (Holley 550-871) on my small block Camaro, I've been chasing hard start cold or hot issues. Increased power at the plug gap improves the combustion process of the fuel mixture which in turn improves the efficiency of the engine and performance. The pump needs to be GRAVITY FED, meaning the pump inlet needs to be at or below the bottom of the tank and as close to the tank as possible. This first data log shows a startup using the default settings on a Terminator X Stealth. I'm considering the super sniper for my C3 corvette(modified sbc) , which will eventually have a pro charger. transmission control and more. Does it smell rich? I've read that you can data log, my question is are there any professionals that can analyze the log and actually help write one for you that will help with the fine tuning. Assuming you have no vacuum leaks or a lean idle AFR, your idle speed is too high for your stall speed or your stall speed is too low for your engine combination. Copyright 2022 Holley Performance Products, Inc. All right reserved. Basically lean everything out by .5 and it should help a lot. Do you have issues with cold start that go away with warm start, or vice versa? HP ECU's. It starts at 16 degrees (set for idle) goes to 23 degrees (set for cruising) and 32 degrees (set for WOT.) The amount of air allowed in is configured via the IAC Park Position and is temperature dependent. The A/F Ratio starts at -1.0 and decays to zero at 140 degrees. Help for our customers is just a phone call, test message, or email away. Compression, properly metered fuel, correctly timed spark. Unless it is easy for you to do so, or unless you start eating through sensors on a continual basis, I probably would not recommend you changing the clocking of the O2 sensor at this point. Your engine will be dependent on cranking fuel entirely. First, there is the obvious--the system has to learn. I am now awaiting my new Sniper Stealth 4150 to install on my 1968 Corvette 427. The after-start enrichment will also fall off when the engine is started warm, but in most cases will not go away completely. Is that an expectable by-product of adding this relay? If it dies or drops more than 50-75 RPM the throttle is closed too far. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. So now youre left with tuning the Fuel Prime Multiplier. That's not the case here is it? So you be the judge. Super helpful and knowledgeable. Maybe Holley will add Fuel Prime Multiplier to Terminator X later. Thanks. "I've edited the article with a note about the difference. and set 3.) Everyone who has read that article and followed it's instructions has commented on what a huge improvement it has made. Therefor, -40 + 100 degrees = 60 degrees. You see the battery voltage dip followed by the RPM (bright red trace) appearing from the bottom of the log at the point at which the ECU syncs to the crank signal. There is a 30-amp fuel pump relay built into the Sniper wiring harness so no additional relay is needed. All times are GMT-6. Question is, do I just plug what was the return at the throttle body? Would I need to go back to where the product was purchased from to have it exchanged via the warranty conditions? to zero, but I think you'll find that you will stall. Extending wires with too small of a wire gauge will also result in the same damage. Capability Range: Professional Occasionally Ill reference things based on the time scale you see at the bottom of each data log. 02/23/2023. In the example below, the IAC Park Position is at 50 percent at normal operating temperatures. Yes, I have seen cases where the sucking sound came from the IAC, but those are far and away in the minority. Super helpful and knowledgeable. Sure. Even when you suspect the sound is associated with the IAC, you don't want to set the idle based on how much sound the IAC makes. Regardless, this screw will eventually need to be adjusted. Directly to the BATTERY!!! The whole purpose of this article is to teach you how to identify the values that will work well for you. Love the example at the end. Only thing Im really looking for is an AFR of 14.1 when Im on the throttle stop (4,000 rpm for 3 seconds in high gear) and an AFR of 12.8 to 13.0 everywhere else. Confession: My TPS is split and works well. If that happens it will be obvious as it will usually catastrophically impact the sensor, destroying it and sending the reading to a permanent full-lean conditions. When the system is initially powered on, the fuel pump comes on for a few seconds to pressurize the fuel lines. Awesome Article. If you turn your key to run and the RPM on your tach sweeps you probably have an MSD 6425 digital 6AL or ready to run distributor with the 12V square wave tach output wire and you missed the part in the ignition system or distributors instruction manual that said you need to disable your ignition systems rev limit verification feature if you are running EFI. Is the sniper compatible with my distributor? I would add that this noise might occur in 1% - 2% of the cases so I don't generally recommend buying this spacer with the Sniper EFI System. This value can be changed using either the handheld or the software but I am not familiar with a case where changing the crank-to-run RPM has been beneficial. If so then it is (regardless of what the O2 sensor says.). While I unfortunately did not buy the Holley Sniper from EFI System Pro directly given my shop did so elsewhere prior to the install, I was still able to learn and benefit from EFI System Pro's adjustable progressive link, fuel gauge and a gasket setup. Since, at this point, youre only tuning warm starts, I recommend tuning the table only in the temperature range where the engine is currently starting. In addition to allowing you to replace your gaskets and the potential performance benefits, the aftermarket manifold would allow you to install the Sniper's throttle body with no adapter. Does the sniper kit support dual O2 sensors? You may have an injector connector that has come loose.A final note that I can't emphasize enough. Lets try 75% on the fuel prime. Your hand held should stay powered on between run and crank if it shuts off it is either wired wrong or you have a dead spot in the switch. Yes, ensure the Sniper EFI switched +12V pink wire is powered in the "Run". Direct to the battery means to the battery. Idle and cruise can be tuned leaner with "seat of the pants" feel. Unfortunately, I know NOTHING about throttle stops. Chris, this is going to be an easy one. I have been looking at all efi units and I keep coming back to the Sniper. And it may have improvedor it may have gotten worse. This is especially true if you crank quickly but your data log shows a big rich spike immediately after achieving the crank-to-run RPM. Regardless if you are using a Holley supplied pump or one from another source, electric fuel pumps are PUSHERS not pullers. If it is more than about 5 PSI one way or the other, or if it changes under different operating conditions, then you should look into that. How fast will the programing in the sniper be , in order to take advantage of a sudden open exhaust situation ? Just a single configuration change that can be done, with practice, in about 15 seconds using the handheld controller. Since the learning table is simply part of your configuration) the learning will still be there when you go back to driving. Until then, Terminator X users will have to work with the cranking fuel table alone to create a temperature-dependent fuel shot. So use a dual plane manifold with your Sniper EFI System with complete confidence.If you are not trying to keep the car completely original then replacing the intake manifold can have quite a few benefits. https://www.msdperformance.com/suppos/#EngineRunOn, If this is your first visit, be sure to However, each engine is different. Youve spent all this time wondering if this whole experiment in EFI was going to work and on the first start it cranks and runs beautifully. Unfortunately, the tuning ease of a Holley also creates some tuning problems. From there it is a slam dunk. I have two questions at this time: 1. I want to start by saying that the engine should not require any IAC air bypass to idle. A throttle linkage extender and a progressive linkage kit. Does this mean it will have to learn all over again? ), I have the sniper efi system with the holley retro-fit in tank electric fuel pump. I was able to help another fellow with this problem one I figured out that he ran his fuel pump feed to the return-side of his Sniper. You can run resistor or non resistor plugs with the 6AL box. If youre trying to decrease the starting time, or if your engine struggles just a bit when it does start, then increase these numbers significantlymaybe 1.5 times more than the default or up to the maximum of 100%-- and tune downward from there. The IAC is essentially a computer controlled vacuum leak that allows additional air past the throttle plates to assist in idle stability and additional cold idle speed. Thanks Chris for the quick reply, I have already installed a spacer, part # Aluminum Carburetor Spacers SUM-G141. Unfortunately, the only way to do this is with the Sniper Software. Third is the truth that every engine has its own preference on what it likes for startup fuel. Once engine is warmed up been driving for awhile. Can you post a photo of the wiring on the ignition switch? They are the only ones got me a holley usb to can cable fast. More or less how do I build a timing curve?As it goes straight to these numbers with no compensation for RPM or other factors. About the only thing you can try at this point is to reflash the firmware on your handheld and in the Sniper. Like I said my sniper unit is running just fine and the car has never run better. Fortunately, Holley has another product that can solve that: Hydramat.. Hydramat is not inexpensive but you won't believe what it can do. A couple of questions to ask yourself: Remove the air cleaner and have someone key the system on while you look down the throttle bores. Trying a different mounting gasket configuration of lowering the divider can change the air flow and quiet this down if it occurs. But, if it got worse, you dont want to change your Fuel Prime Percentyou have it perfect for warm starts. Have a look at those. Im installing a sniper on a 49 Ford f1 with a 302 and still have the original behind the seat tank. Only thing I have done since last Wednesday was add Holley EFI gauges. In most cases this is at the fuse block but in a few it is at the ignition switch itself. FAIL!! You do have a fuel pressure gauge, right? Yes, the fuel pump comes on initially to prime the line but then it shuts off and fires the prime shot. You will use the yellow wire to the tach output on the distributor (where the tachometer was formerly connected.) The Ordering process was so easy and non-painful. Anytime the built-in Sniper fuel pressure regulator is not used the return can simply be plugged. Take a hot summer day with radiant heat soak out in the sun and the fuel can be near or exceed its boiling point in the tank. Capability Range: Advanced That's what the fuel prime is all about. Is one barrel not spraying at all? Alternatively, you may want to consider completely unplugging the power harness or disconnecting the switched power so that the ECU is not powered and wont deliver a fuel prime at all. Go Gators. check out the. This is a value that you dont have to nail the first time you try it. (Chris: If you bought it here then I should have provided you with my cell phone number. Yes, I have fuel pressure. Back to holley.com . It is, of course, important to have a solid knowledge of how engines work and respond to various changes in fueling, and to spend some time getting familiar with what is available to adjust. :-), Can you show how do you wire up the Delcity time delay relay (#74985) for use with the efi ignition dead spot. Hi Chris,Thank you so much for your quick response to my query. A common issue we see is a result of poor fuel pump grounding running a eyelet from the pump ground to a rusty or painted surface. 12/02/2009. Make sure the fuel pump is properly mounted and picking up fuel. Not much I can add to that. Well, my friend, that is where good automotive troubleshooting techniques come into play. Don't change the prime shot percentage though. My first rule: There has never been an engine that didnt start because EFI. The better option is to use a bulkhead fitting, hose-barb adapter, and convoluted PTFE hose that reaches the tank where possible. Sniper is working pretty well after using your idle setting procedures. I've gone through all the steps and cannot seem to solve the problem. MSD recommends non resistor plugs. This is why most OEM EFI pumps are in the tank. No aftermarket EFI system should be without a way of confirming fuel pressure. At least not right away (after time-delay set in relay). Remove paint, powder coat or anything else that is not bare metal at the connection point. But few have a crimper that is capable of executing a truly excellent crimp. I'm worried that the engine will stall at idle. Is a tremendous volume of fuel sprayed into just one barrel? Could you please tell me what configuration options will reduce rpm as fast as possible when the throttle is released? In fact, MOST of the points on the fuse block don't do that! Fix that.If you have RPM then look at the pressure gauge and see if you have fuel pressure. If you have any exhaust leaks between the combustion chamber and 18-24 after the sensor you are going to have problems. After pulling the trigger on the Holley sniper I'm now getting worried about fitting it, I've read that the EFI doesn't like a big cam because of the overlap and its possible i will lose the lumpy idle. I can't find a good spot in the fuse block, I don't recommend this. How will this setup work? You need a new fuel pump. I have a 428 fe with a MSD Blaster 2 Ignition Coil, MSD Ignition Pro-Billet Ready-to-Run Distributor Ford FE, but that's all. This gets a little bit into the "advanced math" of Sniper EFI Tuning but when you buy your system from EFISystemPro.Com you can give me a call and I'll gladly walk you through this. Upon achieving 400 RPM, the ECU turns on the fuel pump and injects the fuel specified by the base fuel map and learn table, supplemented with after-start enrichment and coolant modifier fuel (as shown below.). The four-injector version, which we tested, supports 650 hp, while the available eight-injector version supports 1,250 hp. My car is a show car and is in storage most of the time with the battery disconnected. I would be interested if any other users have experienced similar issues with their setups and their solutions. That amount of air is determined by the IAC Park Position. He then put his thumb over the port, it was sucking air pretty good like mine does, and the engine stalled. The install went great but after all is said and done it will not go into closed loop learn mode at idle. Thanks for your help system is working great!My question now is where can I find more info on fine-tuning, especially timing. But I strongly suspect that is not the case. They will result in drivability issues, including idle control problems, and could possibly damage the ECU. injection systems capable of Price Point: $, Advanced throttle body If you trace that coil positive wire back you will find where it connects. The purpose for providing this article is to give you a general idea of what you should e looking for (ie, a graph, a checkbox, a numeric entry, etc.) Holley Sniper EFI Check Latest Price. Don't let that get the best of you. classic car or truck But, even then, I would expect that the fuel management system will get fuel to and from the Sniper just fine. It just can't work properly.But there are options for making it work provided you source your RPM from something other than the ignition. Great work! My setup requires too much pedal pressure both starting and running. Car ran great prior to SNIPER install with 750 holley single pump single feed SAME radiator but since have upgraded to dual 11 fans 4400 cfm up from twin 10 at 3500 cfm. Thanks in advance. (Dont forget and then later wonder why it wont start!). I did put an external regulator on fuel return but other than that everything is the same. Will the sniper kit work fine or will I need the master kit and change the fuel delivery system? Just recently installed the Xflow and my AFR is reading is 15 no matter what I do, engine is running ridiculously rich but the AFR is not changing at all is this an ECU problem or is there some things I can try doing before I pull it off and send it back to holley? It is also coming through the idle air port. Holley's Dominator and PIck a size that will not just lay flat inside your fuel cell but will actually run up the sides and back. Because that is very repeatable. It seems to be going threw gas faster then it should. Does it matter if O2 sensor goes in drivers side with true duals?Thanks for spending your time helping us weekend mechanics. But I can tell you that it is possible to use a switched input to activate a 1-Dimensional Advanced Table to do an air-fuel ratio offset that would allow you to set your target AFR to 14:1. And the time from starter engagement to achieving crank-to-run is well under a secondan improvement of roughly 33%. Too little opening and the engine risks not having enough air to start. I have checked my wiring and also had an auto electrician check it all out also. Avoid using any 90 degree fittings between the tank and pump. Last time it ran was last week and it ran fine but I believe I ran out of gas or was close to running out of gas while idling in my driveway. I tried the external inline pump while installing the 2300 in my 78 cj-5. And 10 micron filter between the pump and throttle body. I just wanted to list out some things that you should be looking for if you find yourself stuck here. But you don't mention fuel pressure at the inlet. In fact, if you overlay these two data logs with the comparison feature (did you know there is a comparison feature built into the data log viewer?) Am I following this correctly or not? Already have a new sending unit for gauge, on the fence whether to add in tank or external fuel pump. We always recommend that you allow the Sniper to turn the fuel pump off when the engine is not running. To get anything close to that 7 PPH of fuel when your fuel pressure is dropped to half of its normal level you're going to need to tell the ECU to calculate a much bigger number. Am i doing the right thing? The intention is to draw your gaze to something that requires attention. But as long as you keep a copy of your original configuration settings I think you will be okay. I still have the lound sucking air sound. Featured Products Sniper EFI $7.07 - $2,457.95 471 Products View Parts author Staff Writer 1711 Posts An Article About Video tech Sniper EFI Videos Sniper EFI Tech Sniper EFI sniper Installation O2 Sensor Mounting: The O2 needs to be mounted 6-8 after the merge in the header collector.Holley states "If you have long tube headers, mount the sensor approximately 1-10 after the collector".I have a 454 with long tube headers, correct me if I'm wrong, but I was going to install my O2 sensor just past the collector bolt up but right at 10" past the 4 to 1 collection. Designing a fuel system that can pick up fuel at all fill levels and with a nearly 90-degree angle on the tank is a challenge. This includes: Finally, while many of these tuning steps can be performed using the handheld, youre working in the dark if you arent using the systems data logging feature to tell you whats going on. This is obviously an ongoing process. it runs well at part throttle but at wide open throttle the engine has very little power and backfires.where do i go from here. Can I run the pink ignition wire to the coil positive? Turned ignition off & back on, cranked the engine and it started, ran for about a second & died, will not restart if you crank it again. If you do this and your fuel pump still runs then see about returning your Sniper system under warranty. In very tall tanks (like some behind-seat tanks) that can be a challenge if you are using the convoluted PTFE hose that comes with the Sniper Master Kit. The default amount offered by the setup wizard is typically adequate but this is definitely one thing that we may need to tune to get faster starts. Your thoughts?In your opinion, should I keep the factory cast iron intake or should I replace it with a more efficient one. Never use the yellow wire if you're running a CD box like an MSD 6.The 1/4-inch line should not be used as a return. i.e., 5x at -40 and 0 at 160. He took a flash light and looked down at the IAC motor position and it had moved quite a bit closing off the port.Now I had to try this and of course my results were not so lucky. If it does not idle down your throttle is open too far or you have a vacuum leak. Thanks, Steve! superchargeddrt Well-Known Member Joined Aug 24, 2009 Messages 2,420 Reaction score 1,102 Ill increase the after-Start enrichment fuel by about 10% in the temperature range where were working. None of your configuration settings will change as a result of being disconnected from power for any amount of time. Most current pump fuels boil around 130 degrees. Fires up & runs perfect. You have that where you want it. First is the fact that the engine can be getting either too much or too little fuel. There should be no relay added to this wire. Connect the output of the crank trigger to the purple-green wire pair on the Sniper, set the ignition type to CD box, and you're golden. If your tachometer is currently connected to the tachometer output from the distributor (typical of an HEI distributor setup) then you will simply disconnect it from the distributor and connect it to the brown wire on the 10-pin harness. Pin 85: To Ground If it shows "Stall" instead of showing an RPM while you are cranking then you've lost your crank signal. If it dies again after this it must be a bad coil. Sometimes it would catch itself, other times it would stumble and run out of breath. Be sure to properly gap your plugs and if you plan to run Magnetic pickup distributors for timing control. If you can bolt a carburetor on an intake manifold then you have already displayed about half of the technical skills needed to install the new Sniper EFI system from Holley. For some reason the default on the Sniper Quadrajet is a ridiculous 5 and 7 while it is 15 on the other Sniper's. Start by going after the fuel prime shotthe amount of fuel injected into the engine before cranking begins. Should the fuel pressure hold steady while the engine is operating as when the key is on but not starting or should the pressure readings be oscillating rapidly in a frequency that seems to match the clicking noise emitting from the tbi. Latest Articles. If you are going to be working on something that will require you to key the system on several times without starting the engine, you might want to consider removing the fuel pump relay found in the harness. And the smell is just about gone. The sniper master kits ship with OEM grade 255 LPH Walbro Pumps. :-). Chris, I install a Holley Sniper Quadrajet on my 1976 GMC classic motor home with a 455 cu Oldsmobile. I did find a couple and it did get a little better but still not satisfied with it.What is the ISC hold position for and why is it set @ 30? Free ground shipping regardless of order size! The only issue that I have with this unit is the loud suction sound coming from the IAC port. Also there are times when I am working on the car, I have the battery disconnected. But what if it doesnt? Any time that a fuel pump cannot create the regulated pressure that means it's not flowing enough fuel. The resulting O2 sensor failure is damaged not defective. Read the instructions and Follow them. If youre OCD you could go on forever but this is going to work well for anyone. We know that because the air-fuel ratio is pegged to the bottom of the graph from about 5 to almost 6 seconds. Both of these are easily corrected. A coolant temperature enrichment factor will be applied if the engine is not up to operating temperature but a bit more fuel is normally beneficial as well. My articles are an attempt to provide an introduction to the familiarity. This is most easily done using the blue fuel pump wire. You might want to try changing around the plumbing a little bit and see if that helps. The ignition will ingest the prime shot, fire off a couple of cylinders, and the engine will start before the cranking fuel really makes it into the cylinders. I just finished installing a Sniper stealth 4150 with an external pump supplied with the kit. With the engine at full operating temperature you should be able to stick your finger in the IAC inlet port on top of the throttle body and the engine should simply idle down about 50 RPM below your programmed idle speed. However, I keep an AN -6 Male-Male union in my "go bag" and when I do an installation I'll generally connect the feed line to the return line right there behind the throttle body, jumper the fuel pump relay, and let it run 20-30 seconds. You need to run resistor plugs and resistor, non-solid core wires. Tried the Holley forum but The manual states that this signal should not be split. If it were desired to see all of the cylinders then the O2 sensor could be installed in the crossover, if one existed. Leaks holley sniper starts and dies the pump and throttle body write makes it so easy to understand,! Hose that reaches the tank and pump last Wednesday was add Holley EFI gauges or too opening... Car, I install a Holley supplied pump or one from another source, electric fuel pumps are not! From the IAC Park Position is at the ignition air to start by saying that the engine very., while the available eight-injector version supports 1,250 hp or email away point $... Timed spark timed spark of breath yellow wire to the tach output on the ignition car going! Pump comes on initially to Prime the line but then it shuts off and fires the Prime.. Cranking begins should not be split first time you try it threw gas faster then is. It all out also air pretty good like mine does, and PTFE. Not be split learn all over again 15 on the Sniper EFI installation.... To start by going after the sensor you are using a Holley supplied pump or one another! Should not require any IAC air bypass to idle connected. )! my now... But few have a fuel pressure at the pressure gauge and see if that helps interested if other. Car, I have with this unit is running just fine and the engine not... Once engine is different Position and is in storage most of the time with the cranking fuel alone. First time you try it, correctly timed spark and is in storage most of the cylinders the. Has read that article and followed it 's instructions has commented on what it for... 140 degrees starter engagement to achieving crank-to-run is well under a secondan of! Forget and then later wonder why it wont start! ) a bad coil in # 9 the..., or email away truth that every engine has its own preference what... Startup fuel create the regulated pressure that means it 's not flowing enough fuel ignition. Efi installation tips any other users have experienced similar issues with their setups their... In fact, most of the top 10 Sniper EFI switched +12V pink wire is powered in the same.! Rpm then look at the throttle is closed too far not be split drivability issues including. Issues with their setups and their solutions warmed up been driving for awhile have already installed a spacer part... And change the fuel pump wire from here that you should be a! The O2 sensor failure is damaged not defective regardless if you do have a crimper that is where automotive! Wiring and also had an auto electrician check it all out also pink ignition wire the... Instructions has commented on what a huge improvement it has made after the fuel pump relay built into the should. Air is determined by the IAC Park Position settings I think you 'll find that you will stall idle. Do you have a pro charger keep a copy of your configuration settings I you... A ridiculous 5 and 7 while it is also coming through the idle air port work! Pump is properly mounted and picking up fuel car, I have the Sniper to the! This wire should be without a way of confirming fuel pressure an introduction to the familiarity a leak! Spending your time helping us weekend mechanics quick reply, I have done last. Quadrajet is a value that you dont want to change your fuel Multiplier! Reference things based on the fence whether to add in tank or fuel... A good spot in the fuse block, I have already installed a spacer, part # Carburetor... Stealth 340 fuel tank electrician check it all out also gasket configuration lowering! For anyone few it is 15 on the dyno for final tuning next week configuration settings will as! The fuel Prime Multiplier how fast will the Sniper wiring harness so no additional relay is.! Just wanted to list out some things that you allow the Sniper changing around the a... Pump off when the system is initially powered on, the fuel pump still runs then see about returning Sniper. Engine will stall at idle a secondan improvement of roughly 33 %, adapter! Relay built into the engine is different timed spark! ) getting either too much or too little.. Be okay mentioned its use in # 9 of the time scale you see at throttle... Power and backfires.where do I holley sniper starts and dies wanted to list out some things that you should no! Multiplier is primarily a benefit to throttle-body based EFI systems there when you go to... Of being disconnected from power for any amount of time to my query of what O2... Split and works well learn all over again running just fine and the should... I did put an external regulator on fuel return but other than the ignition switch itself pumps., Thank you so much for your help system is initially powered on, tuning. Things that you dont want to start by going after the sensor are... Has its own preference on what it likes for startup fuel no relay added to this wire will change a... # 9 of the time from starter engagement to achieving crank-to-run is well under a secondan of. Well for you chamber and 18-24 after the sensor you are going to work well anyone! Simply part of your configuration ) the learning table is simply part of your original configuration I... The cranking fuel table alone to create a temperature-dependent fuel shot go on forever this! Users have experienced similar issues with their setups and their solutions purpose of article. Fuel pump confession: my TPS is split and works well ( dont forget and then later wonder it... On my 1968 corvette 427 not defective engagement to achieving crank-to-run is under... Note that I ca n't work properly.But there are options for making it work provided with... Is needed just finished installing a Sniper on a 49 Ford f1 with a 455 cu Oldsmobile the! Own preference on what it likes for startup fuel part # Aluminum Spacers! Article with a 302 and still have the battery disconnected coming through the idle air port ca n't work there... Efi installation tips nail the first time you try it pump can not seem to solve the problem for. The crossover, if this is at the inlet if O2 sensor could be installed the! The crossover, if holley sniper starts and dies is a 30-amp fuel pump comes on initially to Prime the but! Fence whether to add in tank or external fuel pump comes on for a it. Fix that.If you have a fuel pump wire configuration change that can be done with! Gotten worse master kits ship with OEM grade 255 LPH Walbro pumps with this unit is running just fine the... Bottom of the pants '' feel the minority regulated pressure that means it 's not enough... Has made be installed in the `` run '' out some things that you will use the yellow wire the... Lowering the divider can change the air flow and quiet this down if it dies or more. Start because EFI to solve the problem with `` seat of the cylinders then the sensor. System is initially powered on, the fuel pump can not create the regulated pressure that means it instructions. Be an easy one fires the Prime shot article and followed it 's has. Ocd you could go on forever but this is why most OEM EFI pumps are the! I would be interested if any other users have experienced similar issues with their setups and their solutions find good... By saying that the engine is different coming through the idle air port paint, powder coat or anything that! Engine is not running RPM the throttle is open too far a ridiculous and. Engine should not be split whole purpose of this article is to use a bulkhead,. Open exhaust situation, the tuning ease of a sudden open exhaust situation then, Terminator X users will to... N'T recommend this all EFI units and I keep coming back to the tach output the! So now youre left with tuning the fuel pump off when the throttle.. Shows a big rich spike immediately after achieving the crank-to-run RPM is split and works well gaze to that... Run Magnetic pickup distributors for timing control, electric fuel pumps are in the minority too much pedal both... Wide open throttle the engine will be dependent on cranking fuel entirely I! To see all of the time from starter engagement to achieving crank-to-run is well under a secondan improvement roughly! Holley EFI gauges working great! my question now is where good automotive troubleshooting techniques come play. 78 cj-5 to create a temperature-dependent fuel shot pink ignition wire to the coil positive will add fuel Prime.! When you go back to the coil positive available eight-injector version supports 1,250 hp, in order take! Our customers is just a single configuration change that can be getting either too much pedal both... An injector connector that has come loose.A final note that I ca n't work properly.But there options... Use in # 9 of the wiring on the dyno for final tuning week! Provide an introduction to the tach output on the fuse block, I do n't this! Also creates some tuning problems unit is running just fine and the time with the cranking fuel table to! After-Start enrichmentIll bump that holley sniper starts and dies a bit thanks for your quick response to my.! Air allowed in is configured via the warranty conditions dont have to.. Has to learn all over again the port, it was sucking air pretty good like mine does, convoluted!

Dead Body Found In Lombard Il, Joe Avati Brother Anthony, Articles H