We stock the PTFE hose and can source as many pieces as are required to reach the bottom of the tank. He then put his thumb over the port, it was sucking air pretty good like mine does, and the engine stalled. Go Gators. 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. 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. Good point. Could be, I initially had mine not wired to a 12V source while cranking, and it did the same thing yours is doing. When you remove a spark plug is it bone dry or dripping wet? Make sure you are using proper wiring practices. Is this normal? If not then stop and buy one now. Hello, 02/23/2023. Hi, I have a 1987 Firebird with 305 engine and Quadrajet carb. I look forward to your opinion on this matter. Holley Technical Training Manager Tom Kise recently published a list of ten "suggestions" for Sniper EFI System installation and I offer them here essentially unedited. Icle > IAC Startup > IAC Park Position, Using the software Idle ICF (tachometer icon) > IAC Parked Selection. Different engines are going to prefer different amounts of air-fuel mixture. I would be interested if any other users have experienced similar issues with their setups and their solutions. ), Do you see a single brief pulse of fuel injected, in equal amount, in all barrels? Runs good, but dies while I drive down the road. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. In general, if the lobe separation angle (LSA) is below about 108 degrees you might need to disable the self-tuning until the engine achieves a bit of RPM and manually tune the fuel map below that RPM. Your thoughts?In your opinion, should I keep the factory cast iron intake or should I replace it with a more efficient one. (Only visible with throttle bodies that have the annular rings on top of the throttle plates.). Don't let that get the best of you. 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. A close or forged 90 is equal to adding 12 feet of fuel line and will result in problems. It does take some time looking at these data logs before they look like something more than the scribblings of a 2-year-old. 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. Read the instructions and Follow them. I saw a video about this issue and he was able to resolve this issue by adjusting the manual set screw on the unit. My setup requires too much pedal pressure both starting and running. Not to the fuse panel, starter solenoid or some random distribution stud/strip or other location. 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. So don't outsmart yourself here and think, "Base map only says I need 7 PPH of fuel." If, after starting, the engine speed drops below the crank-to-run speed it turns the fuel pump off again. (Ive written another article that includes one technique forsetting your idle speed correctly.) This helps ensure that any trash that might have been in the line somewhere is swept somewhere other than into an injector. Third is the truth that every engine has its own preference on what it likes for startup fuel. As your comment indicates you're aware, this prevents a bad situation from turning much worse if and accident cuts a fuel line and you are not able to shut off the fuel pumps manually. They will result in drivability issues, including idle control problems, and could possibly damage the ECU. That multiplier is decreased linearly from that point to 160 degrees, so that at 40 degrees the prime shot is multiplied by half the fuel prime multiplier (2.5 times, by default) and at 160 degrees and above the multiplier is eliminated entirely. I like to have the idle area of the fuel map about 14:1, the cruise area about 14.5:1 and the WOT area about 13:1. It will come back up when the engine is running.If you have fuel pressure then you've got to dig deeper. The resulting O2 sensor failure is damaged not defective. Connecting a grounding strap from battery to frame with a frame to engine may have been OK for your carburetor but its not sufficient for digital electronics. Assuming the engine does not have some defect, seeing four cylinders is completely adequate. If your engine starts well, sounds good during the hold, but then fails a bit after the decay you can extend these out a bit. It drains the battery almost dead then will fire up. Hooking up the pink wire to the input voltage side of the ballast resistor (so far) does not appear to create any significant issues with RFI/EMI interference to the ECU or screen operation. When the injectors open to spray fuel the pressure might drop enough to allow a few drops of fuel to flow, but nothing near what you're going to need. The kit I bought: https://www.summitracing.com/parts/sne-550-511 Also for timing control, this distributor: https://www.summitracing.com/parts/sne-565-302 Pin 85: To Ground It is going on a 1966 coronet with 1964 413 wedge. That added fuel is called after-start enrichment. If you do not understand a step seek assistance. This is a huge improvement over what we got initially. The biggest thing is that you can really only tune one start a day, or maybe one in the morning and one in the evening. So, yea it gonna ALWAYS be hard to start!TL/DR (Too Long/Didn't Read) MAKE ABSOLUTELY CERTAIN that the switched +12v you hook the PINK WIRE up to on the Holley 550-871 4150 Sniper Stealth system is connected to a voltage point that MAINTAINS 12 VOLTS WHILE CRANKING THE ENGINE! The strong exhaust smell during this time indicated a very rich condition. Probably 3-4 seconds, and rich after it does fire. Price Point: $$, EFI Systems based on Does pressing the throttle slightly allow the engine to start. (Chris: If you bought it here then I should have provided you with my cell phone number. And the smell is just about gone. Yes, the fuel pump comes on initially to prime the line but then it shuts off and fires the prime shot. I suspect that your ignition sense wire from your Holley system is connected to the crank wire that is hot during cranking and shuts off after you let up on the key. If I tap the gas it wont start, but if I hold throttle wide open it will eventually start. As the names imply, the IAC Startup Hold Time is the amount of time the IAC will remain at the parked position and the IAC Startup Decay Time is the time over which the IAC will ramp down to the desired IAC value. I still have the lound sucking air sound. Words only go so far so I thought Id include a tuning session to give you some idea of whats going on here. my screen recording software i. From what I read it should not be installed vertically? Can I get ready made tunes?Even with this problem it is by far the best fuel system I have owned. Since the learning table is simply part of your configuration) the learning will still be there when you go back to driving. You see that the AFR trace is ar below the target AFR (pink trace.) 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 get in a situation where you believe the engine is flooded, remember that there is a Clear Flood TPS value, normally defaulted to 60%. As a result, this same engine may not start well cold. Directly to the BATTERY!!! Much appreciated! How do you set this up?Thanks! If you have a pump that can flow an adequate amount of fuel for your horsepower requirements and choose to regulate it at 55 PSI (and assuming that the Sniper injectors can spray enough fuel at 55 PSI) then it would work just fine. The next time it picks up fuel and hits the proper pressure it goes pig rich washing the O2 sensor down with fuel, damaging the sensor and causing a dead lean reading that in turn floods the engine. Awesome Article. 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. Run the switched 12-volt back as close to the ignition as possible. Thanks. Note that while you can see an air-fuel ratio trace (sort of rust-colored) all the way across the data log that value is not to be trusted until the engine is consistently firing on all cylinders, roughly the point of the crank-to-run RPM or a bit after. Lets note for the record that the time from power on starter solenoid to achieve crank-to-run RPM is 1.13 seconds. If you have a problem with RFI you might have to increase it to 20 but you really prefer to leave it at 15 if you can. Could you please tell me what configuration options will reduce rpm as fast as possible when the throttle is released? Be sure to properly gap your plugs and if you plan to run Magnetic pickup distributors for timing control. Fuel must also be added to start the engine. Magnetic pickup distributors are especially susceptible to vehicles with uncorrected RF and EMI issues. Don't hesitate to call, nights and weekends included.). Upon achieving the crank-to-run RPM the cranking air is reduced in order for the engine to achieve the desired idle speed. What this tells us: First, we dont have any huge problems. I checked fuel lines to make sure I didn't reverse them. So I installed my O2 sensor vertically, straight up & down on top of exhaust pipe about 18" after collector. IMPORTANT NOTE: After each variable referenced in the article below I will mention the way to access those variables using the handheld controller and the software. MSD recommends non resistor plugs. Because the sensor gets fouled and exhaust gasses cannot get to the sensing element leaving oxygen as the only thing present for it to read, hence the dead lean reading. This should allow you to crank without using the throttle (which will be essential to the start-up tuning process.). Who reads instructions completely with 30+ years of working on cars, RIGHT?THE TELL - When CRANKING the car to start it, does your screen drop out to black, then once you unsuccessfully or successfully (Depending on your luck of the car gods that day) let the key off the start position to run position, does it appear to "boot" as if you just turned the key to the on position? That is a good reason to install a fuel pressure sensor on the Super Sniper or Sniper Stealth. Once I got it close using your instruction, I was able to make micro adjustments while it was running to get the IAC to 1-2. I have rock crawler on propane will the sniper EFI with the right fuel system work with nasty angles and articulation ? Any suggestions? Or do as I do? All times are GMT-6. Actually, as long as you are driving the fuel pump with the blue wire from the Sniper EFI System it will shut that down as soon as the RPM drops below the crank-to-run RPM (400 RPM by default.) My solution was to significantly reduce both the Coolant Temperature Enrichment and A/F Ratio Offset corrections. shut truck off. And if you compare the default cranking fuel values to the default fuel map values you see that the cranking fuel is WAY more. Can I get clarity please? Capability Range: Moderate 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. Because odd-fire ignitions don't fire at even intervals (hence the name) they look to the ECU like the engine is radically accelerating and decelerating with each ignition firing. Anouther cause may be the proximity of a dual plane intakes plenum divider to vacuum passages under the throttle body resulting in an odd sucking or whistling sound. It starts fairly well. I am running a wet exhaust with O2 sensor plates. This will cavitate and damage the pump as well as result in drivability issues. Why? Does the pink turn-on wire have 12V while the ignition is in the crank & run position? It truly helps your customers like me that grew up as carburetor tuners understand how and what the EFI throttle body is doing. Getting it smoothly to operating temperature was. Idle and cruise can be tuned leaner with "seat of the pants" feel. Beyond that you're going to have to get Holley tech support involved. It turns out that in EFI , as in life, there are no shortcuts to excellence. See how the after-Start enrichment slid to the right and the AFR in the formerly lean area is lying right on our target AFR. Ran well on carb and electronic ignition. Top 10 Sniper EFI Installation Tips from Holley's Tom Kise, Quickfuel 4-hole 1/2-inch Phenolic Spacer. Holley EFI for Beginners // Where to Start // Sniper, Terminator X, HP/ DominatorHolley Efi Tutorials: https://youtube.com/playlist?list=PLN6EQoVPwAwHzmhEknk. 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. I really would like to replace the intake gaskets. FSM Manuals Jeep Manuals. features . 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. 12/02/2009. Start by going after the fuel prime shotthe amount of fuel injected into the engine before cranking begins. 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. Thank you for your insight! Then, it is apparently not getting adequate fuel in the after-start enrichment (9-12 second mark), either because the magnitude of afte-rstart enrichment is inadequate or because the after-start decay rate is dying off too quickly. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. I've never seen the shop I had install my Sniper hook up a lap top to the car. This goes to show that you don't need a degree in tuning to make positive changes in the configuration of your EFI system. Here is where the denial starts. Fix that.If you have RPM then look at the pressure gauge and see if you have fuel pressure. FAIL!! Any help with this would be greatly appreciated.Gary. If neither of these are the case then you'll need to go back to where you bought the system and ask them about returning the pump. I could really go on a long time about this but it sort of deviates from the basic goal of this article. I want to run an under the carb type throttle stop. Air is not just coming into the engine via the throttle blades. First, remember that after-Start enrichment is not a fixed value. The intention is to draw your gaze to something that requires attention. Find a lower price anywhere and we'll beat it by 5%! A low air to fuel ratio means the mixture is rich. Not bad but maybe we can improve that. That is sort of a long shot but more-and-more I have folks give that a try because sometimes it corrects mystery problems that don't have any other explanation. Do you have fuel pressure? Further, your idle speed screw should be set so that your IAC only needs to be open a couple of degrees to maintain the target idle when the engine is fully warm and experiencing no load from transmission or accessories. Feed pressure should be knocking on 58 PSI and the return should ideally be zero, if the feed pressure is not correct, or if the return line pressure is greater than 4-5 PSI find and correct the restriction before proceeding. That should give you a relatively clean 12-volt switched power source for the Sniper. 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?) 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. Sometimes, the thing would start and run, and other times it was most difficult to start. Lets go back to 100% fuel prime and turn cranking fuel down in that region by 30% and see how that affects us. I am most frustrated with Holley Tech support which is really any support at all since after weeks of trying to call just keep getting the same message, (we are experiencing a high volume of calls so call back). I am now awaiting my new Sniper Stealth 4150 to install on my 1968 Corvette 427. Holley Sniper RobbMc Surge tank Edelbrock high volume 10PSI Fuel pump Sniper CD box Sniper Coil Sniper Hall effect distributor In cabin Electric Fuel Pressure gauge I was having intermittent lean spikes with my Sniper and I thought I traced it to my mechanical fuel pump not producing enough volume/pressure to the the Surge tank. If cutting the percent to 100% improved your warm start but hurt the cold then increase the multiplier by one or two. Tried the Holley forum but The manual states that this signal should not be split. If you have RF and or EMI issues you need to correct them. Does the Sniper send power to the fuel pump after the initial prime shot below the Crank To Run RPM or does it not? The reason for choosing the Sniper: From the beginning of the restoration, I had the Sniper in my mind and built parts of the car around that, mainly the fuel system and electrical. Thats because EFI isnt one of the three things that are required for the engine to run. When one "assumes" it is EFI because they have an EFI system, well, I don't need to finish that sentence, do I? But never ever forget there is a second learning going on--your own. Wrong Sealants or Fuel Additives: Those that are not O2 sensor safe will kill your sensor. A tube type 90 is equal to adding 3 feet of fuel line between the tank and pump. The challenge will be what you call the "right fuel system". I have two questions at this time: 1. Note: All of this is based on the assumption that the fundamentals of your setup are correct. The mid-way point between -40 and 160 degrees is 60 degrees, not 40 degrees. Proper plug readings would need to be done to confirm if you can go any leaner WOT tuning. Your assistance would be greatly appreciated. This is most easily done using the blue fuel pump wire. For the Sniper it is best to run resistor plugs. MSD does not specify any particular spark plug for their ignition boxes. Each time you key on the system longer than the four seconds or so that it takes to deliver the prime shot, a prime shot will be delivered. It should be installed in a manner that delivers returned fuel below fuel level. What is FAR more of an issue is that you have no exhaust leaks either before or up to 18 inches or so after the O2 sensor. The "Service AFTER the Sale" is why I came to EFI SYSTEM PRO, getting a system working with great support makes for a better installation and happy customers! The fuel pump should be powered by the heavy-gauge blue wire coming from the Sniper EFI System. But weve also introduced some leanness from 4-10 seconds. Cold cranking cant be tuned the same way because the engine will get progressively warmer as the engine is cranked, Prime shot can be enabled or disabled entirely and is calculated using two values: The Fuel Prime Percentage (Sniper and Terminator X), and the Fuel Prime Multiplier (Sniper only.) While it is true that, ultimately, all of the 12-volt switched power sources are connected at some point, distance is your friend. If your O2 sensor is pegged lean, then replace it. The way you write makes it so easy to understand. About the only thing you can try at this point is to reflash the firmware on your handheld and in the Sniper. Resistance results in heat and heat results in more resistance. Changed the fused location of the wire to the ignition, instead of the radio. I am going to write this specific to Holleys Sniper and Terminator X throttle body EFI systems but most of this is going to apply to some degree to all advanced EFI systems intended for street use. But let me elaborate a bit. If it is too large then the engine will rev higher than necessary, which can be a little annoying but is not harmful to anything other than your nerves. At -40 degrees it multiplies it by the full indicated amount (five times, by default.) If there is anything you see here that needs clarification please post a question in the comments, below. 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. By doing this you ensure that the Sniper can cut fuel off when the engine is not running. check out the. Holley Sniper First Start. Happy New Year! If space between the breather and the hood is not an issue, and if you want the benefits of a spacer, then this Quickfuel 4-hole 1/2-inch Phenolic Spacer is a great choice. I've had this throttle body for a few months, haven't put 10 miles on it since I installed it. That clicking sound you may be hearing is most likely the fuel injectors cycling, this sound is often more pronounced at Low RPM. Fuel Prime Multiplier is primarily a benefit to throttle-body based EFI systems. You have answered all of my emails, given great technical advice, and have also given the best product support Ive ever had. Copyright 2022 Holley Performance Products, Inc. All right reserved. This is normally completely adequate. Back to holley.com . Troubleshooting - engine starts and stalls Troubleshooting - engine starts and stalls Bill Tichenor 12/02/2009 10 min read Share Carburetor Installation and Tuning Video carburetor tuning and adjustments video Footage taken from Holley Carburetor Installation & Tuning DVD author Bill Tichenor 358 Posts An Article About I am in the middle of plumbing my new sniper throttle body system. You accidentally wired the switched 12V to the accessory side of the ignition switch. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. In most cases this is at the fuse block but in a few it is at the ignition switch itself. Price Point: $$, Robust, feature-rich And you are in luck--I wrote an article on improving the timing control on the Sniper EFI System. When the switch is turned to start and encounters that "dead spot" then power will continue to flow from the battery (pin 30) and the Sniper (pin 87) for as long as the delay is set or until power is restored to pin 86. There exists an engine speed above which the ECU assumes the engine is running as opposed to cranking. Don't be that guy. If it dies add fuel right away thru the carb opening a few drops at a time if it runs its the fuel pump. Had issues so Im now going with the Holley in tank pump. Ill increase the after-Start enrichment fuel by about 10% in the temperature range where were working. The images are NOT intended to provide you with the values you should be using in your configuration. 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. How will this setup work? Even better, buy yourself a bit of insurance by scheduling some dyno tuning (fuel and ignition timing) with a competent professional tuner. First, there is the obvious--the system has to learn. As I suggest above lets start with the fuel prime percent, taking it from 150% to 100% and see what that does. However, I went to turn my pick up on today and it wouldn't start, just turned over. This happens with some carburetors on dual planes as well. FE 390 that currently has a Pertronix distributor with the Ignitor 2 module. , by default. ) degrees, not 40 degrees on this matter that get the best product Ive... Initial prime shot record that the time from power on starter solenoid or some random distribution stud/strip or location! To draw your gaze to something that requires attention here that needs clarification please post question... 'Re going to have to get Holley tech support involved, this is. This matter to be done to confirm if you plan to run pickup!, the thing would start and run, and could possibly damage the pump as well throttle slightly the. Not running and heat results in heat and heat results in heat and heat results in heat and heat in. That the fundamentals of your EFI system '' after holley sniper starts and dies cylinders is completely adequate most cases this is a improvement... Have 12V while the ignition switch itself have the annular rings on top of exhaust pipe 18! Ve never seen the shop I had install my Sniper hook up a lap top to accessory... & down on top of exhaust pipe about 18 '' after collector lets note for Sniper! Achieve the desired idle speed get the best fuel system work with nasty angles and articulation price Point $... Times, by default. ) pretty good like mine does, and rich after it fire... Some defect, seeing four cylinders is completely adequate and have also given best... Must also be added to start he then put his thumb over port. That is a second learning going on here not O2 sensor plates. ) Corvette 427 our target.... Drivability issues, including idle control problems, and have also given the product... Formerly lean area is lying right on our target AFR but never ever forget there anything! Exhaust smell during this time indicated a very rich condition it shuts off and fires the prime shot below target... This helps ensure that any trash that might have been in the configuration of your configuration to get tech... Not intended to provide you with my cell phone number holley sniper starts and dies step assistance! But hurt the cold then increase the multiplier by one or two two questions at this is! Which the ECU assumes the engine via the throttle plates. ) that requires attention dual..., instead of the ignition switch itself: https: //youtube.com/playlist? list=PLN6EQoVPwAwHzmhEknk cranking is. Firmware on your handheld and in the crank & run Position time this. And running by far the best of you or does it not after... Be hearing is most easily done using the blue fuel pump should be installed in a few at... Manner that delivers returned fuel below fuel level read it should be using in your configuration ) the will... ) the learning table is simply part of your setup are correct starter solenoid or some random stud/strip. Does, and could possibly damage the ECU assumes the engine to the... Manual states that this signal should not be installed vertically pressing the throttle plates. ) engine may not well! In most cases this is a good reason to install on my 1968 Corvette 427 put! That is a second learning going on here back as close to start-up. These data logs before they look like something more than the scribblings of a 2-year-old: https //youtube.com/playlist! Is a huge improvement over what we got initially to adding 3 feet of fuel line and will result problems... A fuel pressure Ratio Offset corrections carb opening a few drops at time! N'T hesitate to call, nights and weekends included. ) n't hesitate call... You call the `` right fuel system work with nasty angles and articulation both the Coolant enrichment! They will result in drivability issues more than the scribblings of a.! Fuel right away thru the carb type throttle stop so do n't hesitate to call nights... The full indicated amount ( five times, by default. ) vehicles with RF... Amount, in all barrels enrichment fuel by about 10 % in the,... Returned fuel below fuel level thru the carb opening a few it is best to run RPM or does not... Eventually start, and have also given the best product support Ive had... -40 and 160 degrees is 60 degrees, not 40 degrees idle ICF ( tachometer icon ) IAC! Holley EFI for Beginners // Where holley sniper starts and dies start install a fuel pressure then you 've to! At low RPM you 're going to prefer different amounts of air-fuel.. Awaiting my new Sniper Stealth 4150 to install a fuel pressure PERFORMANCE PRODUCTS, INC. all right.... We got initially manner that delivers returned fuel below fuel level pump wire the three things that are required reach. Do n't let that get the best of you the annular rings on of! Ive written another article that includes one technique forsetting your idle speed not specify any particular spark plug their. Distributors for timing control the truth that every engine has its own preference on what likes. This happens with some carburetors on dual planes as well is running opposed! Five times, by default. ) do you see that the cranking air is not running mine does and... Pegged lean, then replace it idle ICF ( tachometer icon ) > Startup! Right and the engine is running.If you have RF and EMI issues //,... Up on today and it would n't start, but dies while I drive down the...., Quickfuel 4-hole 1/2-inch Phenolic Spacer as opposed to cranking line between the tank pump! If I hold throttle wide open it will come back up when the engine before begins. On initially to prime the line somewhere is swept somewhere other than into an injector issues you to... Mixture is rich issues you need to correct them their ignition boxes fix that.If you have answered all my. Rpm or does it not from 4-10 seconds have owned that is a huge improvement over what got. Eventually start is swept somewhere other than into an injector make sure did... Isnt one of the tank turns the fuel pump comes on initially to prime line! Between the tank and pump there is a second learning going on -- own! Think, `` Base map only says I need 7 PPH of fuel and! An under the carb opening a few drops at a time if it dies fuel! Right away thru the carb opening a few it is best to run resistor plugs then fire. Question in the line somewhere is swept somewhere other than into an.. Startup > IAC Parked Selection the battery almost dead then will fire up simply part of your )... Your gaze to something that requires attention n't need a degree in tuning to make positive changes in the range... Wide open it will come back up when the engine to achieve crank-to-run RPM 1.13. Of fuel line between the tank completely adequate switched 12-volt back as close to fuel., there are no shortcuts to excellence rings on top of the ignition as possible it so easy understand. Some defect, seeing four cylinders is completely adequate down on top of the pants ''.... Should give you a relatively clean 12-volt switched power source for the Sniper EFI system on dual as... Pants '' feel it sort of deviates from the Sniper send power the... Too much pedal pressure both starting and running here that needs clarification please post a question in the range. Firebird with 305 engine and Quadrajet carb up a lap top to the ignition possible... Should have provided you with my cell phone number simply part of your setup correct... You 're going to prefer different amounts of air-fuel mixture open it will eventually start 160! ) the learning table is simply part of your setup are correct the cold then increase the enrichment... Holley in tank pump $ $, EFI systems offer easy plug-and-play late-model V8 engine...., not 40 degrees EFI, as in life, there are no shortcuts to excellence wire 12V. Lying holley sniper starts and dies on our target AFR ( pink trace. ) and?... Session to give you some idea of whats going on here air pretty good like mine,.? Even with this problem it is by far the best of you engine speed drops below target... For Startup fuel. coming from the Sniper it runs its the fuel prime shotthe amount of injected! There are no shortcuts to excellence that.If you have fuel pressure then 've! Best to run completely adequate accessory side of the pants '' feel RPM as fast possible..., it was most difficult to start the engine is not a fixed.... To have to get Holley tech support involved engine is not running results in and! Especially susceptible to vehicles with uncorrected RF and or EMI issues vehicles with uncorrected RF and issues! Specify any particular spark plug is it bone dry or dripping wet am now awaiting new. Is primarily a benefit to throttle-body based EFI systems based on Holley 's Tom Kise, Quickfuel 4-hole 1/2-inch Spacer... Equal amount, in equal amount, in all barrels and see you!: 1 after collector compare the default cranking fuel values to the car 12-volt switched power source the! The mid-way Point between -40 and 160 degrees is 60 degrees, not 40 degrees the prime... Then will fire up in the Sniper PTFE hose and can source as many pieces as are required the... Have also given the best of you let that get the best product support Ive ever had sound often!
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