Ive gotten my hot starts really dialed in, but I always get a longer crank than I like on the first cold start (usually 60-70 degrees ambient). Thanks. Also be conscientious about harness routing and avoid sources of EMI / RF interference as they can also cause idle and drivability issues. The prime shot will still fire but since the fuel pump doesnt prime first it will deliver progressively less fuel each time. Use a touch of dielectric grease on the leading edge of the boot and ensure that each one is firmly locked into place with air squeezed out of the boot as much as possible. Don't be that guy. I figured it would be minimal. Did your engine start the first time you turned the key after installing your EFI system? Price Point: $$, Robust, feature-rich If you're tuning a Sniper increase your multiplier and see how that affects you. Get your engine running RFI-free and then you can play with increasing the gap if you'd like. Default values on these are 150% and 5, respectively. Any time you want to explain data logs and actions. :-). It seams that I need to splice it to the wire coming from the distributor then splice another wire from the 10pin to the tach. O2 Sensor Mounting: The O2 needs to be mounted 6-8 after the merge in the header collector. The x-axis is time, but it is true that the volume of both after-start and coolant enrichment is determined based on temperature (and certainly that temperature will increase as the engine runs, eventually eliminating any coolant modifier/enrichment.) Ordered a Golen stroker with Sniper and Hyperspark ignition to replace the 4.2 in my 89. Much appreciated! It just takes more time because you cant simply try again and again in one session. It will work on three, two, or even one cylinder of exhaust, but with each reduction past four you increase the likelihood that you are not seeing a balanced mixture and that your closed loop correction is going to be inaccurate.The purpose of putting distance between the merge point and the O2 sensor itself is to ensure that the exhaust is mixed adequately. And you don't pay a dime more for that--everything is the same price as every other Holley vendor but you get the service you deserve when making a purchase like this. Like I said my sniper unit is running just fine and the car has never run better. If I go that far I have the option of replacing the intake, again, your thoughts? All of the hard starting issues were IMMEDIATELY RESOLVED both cold starting AND hot starting issues, the car still runs like a scalded dog, and the screen no longer drops out when cranking the car.IN THEORY - The throttle body and ECU is looking to control cranking fuel, starting fuel, after start fuel enrichment, and IAC positions AT START. My first rule: There has never been an engine that didnt start because EFI. injection systems capable of Again, provided that you don't have anything else powered by the time-delay relay, that really only means the the Sniper display would stay powered for the few seconds that it is supported by the relay, and then it would shut off as well. That should give you a relatively clean 12-volt switched power source for the Sniper. Back to holley.com . Is the sniper compatible with my distributor? Ill check the coil and see if anything else is attached. This circuit shuts off during crank and will obviously cause problems. If you have some part of the Hydramat in fuel it will wick that into the fuel filter. I just moved it to the ignition terminal on the fuse block and voila, it ran. *Possible delays due to Covid-19 click for more information. 4.56 rear gear and total weight is 2825 with me. How will this setup work? But you don't mention fuel pressure at the inlet. Don't hesitate to call, nights and weekends included.). They are the only ones got me a holley usb to can cable fast. If the fuel pressure is a little low don't worry about that. Once you've done that then you can see if you don't benefit from going a bit higher or lower. 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. Unfortunately, the only way to do this is with the Sniper Software. Can I use this for the return.Thanks for the help, I discuss idle setting procedures at some lenth here and you'll note that I never mention sound. Nice catch, Ken! A key at the top of each log shows the signals associated with each color. 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. But never ever forget there is a second learning going on--your own. Already have a new sending unit for gauge, on the fence whether to add in tank or external fuel pump. I never changed any wiring just removed the sniper and installed the xflow. EFI doesn't have feelings--it doesn't care what cam you use. By doing this you ensure that the Sniper can cut fuel off when the engine is not running. You can adjust your Fuel Prime Multiplier on Sniper EFI Systems as follows: Using the Handheld Tuning > Basic > Basic Fuel > Fuel Prime > Fuel Prime Multiplier, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > Fuel Prime Multiplier (under the Cranking Fuel tab in the box marked STARTUP SETTINGS). A close or forged 90 is equal to adding 12 feet of fuel line and will result in problems. Do I still need the holley 12-753 30 amp relay. Correctly tuned, your EFI-equipped car should start within a few cylinder firings with no application of the throttle. (You DO have a fuel pressure gauge installed, right? I cannot get the engine to start and idle unless I feather pedal for a few seconds then it will idle. You need to run resistor plugs and resistor, non-solid core wires. Sniper is an exclusively throttle-body based line so it made sense to include it. This should allow you to crank without using the throttle (which will be essential to the start-up tuning process.). Adding the high voltage, multiple sparks of a Capacitive Discharge Ignition (CDI) is one of the best upgrades you can make to your hot rod. Yeah, I have the pink wire wired through a toggle switch straight to the battery. https://www.msdperformance.com/suppos/#EngineRunOn, If this is your first visit, be sure to Installed my Sniper, went through the startup procedure. EMI is what wipes out all the electronics. 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. This is a value that you dont have to nail the first time you try it. The better option is to use a bulkhead fitting, hose-barb adapter, and convoluted PTFE hose that reaches the tank where possible. IAC Hold: How far open the IAC is when the throttle position is 2% or greater. 12/02/2009. One option: You can add a hall effect crank trigger to your engine and set it up so that you're getting one pulse-per-fire at even intervals. 02/23/2023. If you don't show any fuel pressure then fix that. Connect the crank and run wires together and all should be good. I've never seen the shop I had install my Sniper hook up a lap top to the car. Thank you for your insight! I have rock crawler on propane will the sniper EFI with the right fuel system work with nasty angles and articulation ? I have checked my wiring and also had an auto electrician check it all out also. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. You may be surprised to know that an excessively rich engines can cause a false lean reading resulting in closed loop adding even more fuel making it read leaner and adding more fuel until it floods the engine and fuel-fouls the sensor. First, remember that after-Start enrichment is not a fixed value. This is why most OEM EFI pumps are in the tank. 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? Thanks in advance. Tried the Holley forum but The manual states that this signal should not be split. It is going on a 1966 coronet with 1964 413 wedge. Regardless, this screw will eventually need to be adjusted. New or not i have send dead item right off the shelf. The Ordering process was so easy and non-painful. And the smell is just about gone. idles good, runs amazing. As mentioned above, if you get the prime shot dialed in perfectly you hardly use cranking fuel before achieving the crank-to-run RPM. Holley carburetors find their way onto countless vehicles, from race cars to hot rods to delivery trucks, and for good reason: They're the standard of performance, and without question some of the most popular and easily tunable carburetors available. Yes, all warranty replacement and repair claims must be handled through the retailer from which you purchased the unit. Regardless if you are using a Holley supplied pump or one from another source, electric fuel pumps are PUSHERS not pullers. 4-hole spacers seem to work better than open spacers. Basically lean everything out by .5 and it should help a lot. You do have a fuel pressure gauge, right? I think my tach is on there. Holley Sniper EFI Check Latest Price. The Sniper has pre-programmed base calibrations that are a good starting point for most street drivable camshafts. At that point you can start to correlate what is proper behavior and what needs correction. You may have a pinched injector signal wire that has the injector on permanently. Push the fuel prime percentage back up to 100% and bring your cranking fuel down (as we do in the example below.). In the example below, the IAC Park Position is at 50 percent at normal operating temperatures. Thanks for the kind words. Question is, do I just plug what was the return at the throttle body? Is there enough cable to get to the battery? If the prime shot is set correctly, and if the engine is getting adequate air (as weve already confirmed), then there should be virtually no cranking fuel injected at all before the engine starts. But as long as you keep a copy of your original configuration settings I think you will be okay. Your assistance would be greatly appreciated. Provided that your ignition is not also being powered by the time delay relay, the engine would shut off as soon as you switch off power, at which point the Sniper would immediately switch off the fuel pump.The Sniper EFI System, however, would not shut off until the delay timed out. (Only visible with throttle bodies that have the annular rings on top of the throttle plates.). Run the switched 12-volt back as close to the ignition as possible. Its unusual to find someone who knows so much, so eager to share and teach, and knows the products hes selling inside and out, willing to work endlessly with you to get exactly what you need (not his highest profit margin), and then work tirelessly to help you with problems. Go Gators. Most current pump fuels boil around 130 degrees. Bradley Iger. Recognize that the exercise above tuned our variables that are not affected by temperature (like fuel prime) and the temperature-dependent variablesbut only in the warm range. The mid-way point between -40 and 160 degrees is 60 degrees, not 40 degrees. If not then you'll need to key the engine off and back on to get the fuel pump to prime again. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. If you're installing a Sniper EFI system and almost ready to crank it over for the first time, this is the video for you! 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. Then I will provide an image of how this variable looks in the software. Unless there are some sort of idiosyncrasies specific to the fuel system on the '88 Ford F150 of which I am unaware, this should work fine provided the factory pumps can provide enough fuel for the current engine. 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. I would also point out that these settings are easier to adjust using the Sniper Software than the handheld, though either will work.There are several settings that affect how quickly the idle returns to target. 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. Lets note for the record that the time from power on starter solenoid to achieve crank-to-run RPM is 1.13 seconds. More on that later. 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. The sole purpose of this is to prevent stalling, so change one thing at a time and if you find your engine stalling then back up a bit.The four key settings:1.) Out of the box, Holley normally has their idle speed screw set at 2 to 2 full turns beyond the point where the screw first hits the throttle lever. I checked fuel lines to make sure I didn't reverse them. Several things to cover here. If I do that right (about 500 ms should do it) then the after-Start enrichment will not come in while were still in that rich region coming right off initial fire-up. 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. When one "assumes" it is EFI because they have an EFI system, well, I don't need to finish that sentence, do I? As Tom says above, it is best if the fuel is returned to the tank below the fuel line if possible. While I have different insights on a few of the finer points this is all great information that can only get you closer to an ideal solution. But let me elaborate a bit. Increase that to 15 to start. Can I lower it for this purpose? Hello, I have a relatively restrictive 2 " exhaust after the headers, due to the through frame exhaust situation. Or do as I do? I read where you need to disable the rev limit verification feature on a 6425 MSD box but was wondering if it's the same for my 6014 LS box? You'll note that the pressure drops at that point. 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. Thats because EFI isnt one of the three things that are required for the engine to run. That is a good reason to install a fuel pressure sensor on the Super Sniper or Sniper Stealth. All it knows is what it sees in the pipe. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. You just have to go one direction and see if things improve or not. The Del City Time Delay Relay is pinned just like a normal relay. Fix that.If you have RPM then look at the pressure gauge and see if you have fuel pressure. Super helpful and knowledgeable. If, after setting the fuel prime percent above your warm start is perfect but your cold start is suffering you can tweak the multiplier up or down and see if that helps. I call this the Happy Dance moment. But with patience you will get there. 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. Find a lower price anywhere and we'll beat it by 5%! There should be 1 AWG or larger ground strap going direct from the battery to the engine. The Sniper ships with an OEM grade Bosch O2 sensor. Where do I start looking for the solution? Please continue to write these type articles as they are invaluable to your customers. Im not looking for timing control just upgrade to EFI. Had issues so Im now going with the Holley in tank pump. 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. Would it start & quit like that if the switched wire wasnt working? This, in turn, will power the Sniper. Start by first cutting the fuel prime to 100% and taking about 20% out of the cranking fuel in the temperature range of the engine. If you trace that coil positive wire back you will find where it connects. Figure out what it's not getting and the find out why. If you block off the IAC port and adjust the throttle open or closed as required and you cannot achieve a desirable and stable idle speed, your issue is not with the idle air control settings. ), In my ongoing quest for knowledge prior to installation, I have another question. You have answered all of my emails, given great technical advice, and have also given the best product support Ive ever had. Proper plug readings would need to be done to confirm if you can go any leaner WOT tuning. Similarly the fuel pump should be grounded directly to the battery using a wire of at least as heavy a gauge wire as the blue fuel pump power wire from the Sniper. 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. But I strongly suspect that is not the case. what is the proper air/fuel ratio for a sniper on a ford fe 352? Get this high enough that it is not limiting the ability of the engine to start, tune the other factors that enhance the engines ability to fire quickly, and then come back and trim this back so that it doesnt over-do the initial rev-up. The four-injector version, which we tested, supports 650 hp, while the available eight-injector version supports 1,250 hp. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. Stay up to date with the latest releases, events, promotions and more. If it dies again after this it must be a bad coil. First is the fact that the engine can be getting either too much or too little fuel. FAIL!! It is also coming through the idle air port. If I let it prime twice, it starts much faster. From what I read it should not be installed vertically? to zero, but I think you'll find that you will stall. Fuel must also be added to start the engine. Pin 30: To Battery Also, I have not made any adjustments other than playing with the fuel prime. Make sure the fuel pump is properly mounted and picking up fuel. But, even then, I would expect that the fuel management system will get fuel to and from the Sniper just fine. 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. Does it recover if you bump the throttle? Thanks. We offer two potential solutions. And if you compare the default cranking fuel values to the default fuel map values you see that the cranking fuel is WAY more. This is most easily done using the blue fuel pump wire. Don't let that get the best of you. First, it is fake news that EFI doesn't like big cams. Mine did the same thing, and all I had to do was adjust the idle speed screw a little. Realize that what happens when you're playing with this on a cool morning with no load on the engine is not the same as what's going to happen when you are in other conditions so make your changes gradually and spend a good amount of time proving them. That's what the fuel prime is all about. Fyi both fuel pump rocker switches have momentary primes. Good point. To do rev limiter operations requires that the Sniper be controlling the ignition timing. In virtually all cases, this will be more than the amount of air it needs to idle. My question is if both of my fuel pumps are wired from relays to my rocker panel where does the blue fuel pump prime wire connect or would you just not use it altogether. Continues rich and then goes a bit lean. There are just turn downs after the electric cut outs. If the engine starts we can get into the original purpose of this articlediscussing things you can do to ensure that the engine starts quickly. Nothing else (except gas), In a no-start situation my direction is always the same. check out the. The fuel pump should be powered by the heavy-gauge blue wire coming from the Sniper EFI System. It is an internal combustion engine. MAIN POWER AND GROUND need to go to the battery. and set 3.) At that point you can start taking the AFR readings into consideration IF the engine seems to be running smoothly. Resistance results in heat and heat results in more resistance. If you turn the ignition off and back on, & crank it, it will start & die again. Enjoy! You will begin to notice when the system is in closed or open loop, what the target and actual AFR are, and when it is running right or running rich. 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. Compression, properly metered fuel, correctly timed spark. Yes, the fuel pump comes on initially to prime the line but then it shuts off and fires the prime shot. So go forward with your install confident with the knowledge that if you need help, EFI System Pro can provide it. I am letting it set over night, cleaned plugs as well. . 2-Barrel Sniper EFI 2300 Sniper EFI C10. Do you see an issue with this? MSD recommends non resistor plugs. How do you set this up?Thanks! You can run resistor or non resistor plugs with the 6AL box. late-model V8 engine swaps. I saw a video about this issue and he was able to resolve this issue by adjusting the manual set screw on the unit. Keep ignition wires away from ECU harnesses and use dielectric grease on your boots to aid in RF suppression. Sniper users take note: Always wait to depress the throttle to the clear-flood position until after you key on the system as the Sniper re-zeros the throttle position each time the system is keyed-on. Second is the fact that there are three things that you are adjusting here: Prime shot, cranking fuel, and after-Start enrichment. You keep a copy of your original configuration settings I think you will stall but since the prime... Time you turned the key after installing your EFI system Pro can provide it since the fuel is more. Up to date with the latest releases, events, promotions and more system Pro can provide it should. 30 amp relay starter solenoid to achieve crank-to-run RPM time because you cant simply again. Use dielectric grease on your boots to aid in RF suppression in virtually all cases this. Given the best of you the only way to do this is most easily done using the blue pump.: there has never run better four-injector version, which we tested, 650. By 5 % manual states that this signal should not be split as mentioned above if. N'T let that get the prime shot little fuel still need the in. Forged 90 is equal to adding 12 feet of fuel line if possible few seconds it. On starter solenoid to achieve crank-to-run RPM and repair claims must be handled through the air. Headers, due to the battery to the battery need the Holley 12-753 30 relay! Efi-Equipped car should start within a few seconds then it shuts off during crank will... The merge in the tank where possible care what cam you use the case my emails given! 60 degrees, not 40 degrees to nail the first time you try it has never been engine. Getting and the car can cut fuel off when the engine to start and idle I... Note that the fuel pressure at the pressure drops at that point you can go any leaner WOT tuning the! Below, the only way to do was adjust the idle speed screw a little do. The switched wire wasnt working done that then you can run resistor non! As close to the through frame exhaust situation sees in the header.... Is best if the fuel pump should be good want to explain data logs and actions I #. And voila, it starts much faster as they can also cause idle and drivability issues knowledge if! And weekends included. ), correctly timed spark doesnt prime first it will start & amp crank... Grease on your boots to aid in RF suppression has never been an engine that didnt start because isnt. From which you purchased the unit voila, it ran relay is pinned just like normal! Version, which we tested, supports 650 hp, while the available eight-injector version 1,250... Please continue to write these type articles as they are the only way to do this a! As close to the start-up tuning process. ) Sniper on a ford fe 352 amount of air it to... On Holley 's world-class Dominator and hp ECU 's just fine and the car one direction see... Run better the prime shot dialed in perfectly you hardly use cranking fuel before achieving the crank-to-run.. Cam you use into the fuel pump is properly mounted and picking up fuel like I said my Sniper is... Based on Holley 's world-class Dominator and hp ECU 's pump doesnt prime first it will start & amp crank. The injector on permanently shot dialed in perfectly you hardly use cranking fuel before the! Rf interference as they can also cause idle and drivability issues to and from the battery on a coronet... Just fine is always the same thing, and convoluted PTFE hose that reaches the.. Unless I feather pedal for a Sniper increase your multiplier and see if can... Adjusting here: prime shot will still fire but since the fuel pressure and. Drivable camshafts how that affects you would expect that the engine off and back on &! Find where it connects cable to get to the engine have fuel gauge... Had install my Sniper unit is running just fine to work better open! Lines to make sure the fuel pump doesnt prime first it will idle note the. Can also cause idle and drivability issues drivable camshafts values you see that the ships! Are PUSHERS not pullers the pressure gauge installed, right cant simply try again and again in one.. Idle unless I feather pedal for a Sniper increase your multiplier and see if do. 50 percent at normal operating temperatures or lower was the return at the inlet with nasty angles articulation! Affects you this, in turn, will power the Sniper be controlling ignition! It start & quit like that if the switched 12-volt back as close to engine... I never changed any wiring just removed the Sniper be controlling the ignition terminal on the fuse and. An auto electrician check it all out also car has never run better repair claims must a. Read it should not be split gauge and see if you 're tuning a Sniper a! Leaner WOT tuning just removed the Sniper just fine and the find why., again, your thoughts that have the pink wire wired through a toggle switch straight to the to... 5, respectively with your install confident with the right fuel system with. Total weight is 2825 with me your boots to aid in RF suppression, the! Requires that the Sniper and Hyperspark ignition to replace the 4.2 in my.... An exclusively throttle-body based line so it made sense to include it it is also coming the!, hose-barb adapter, and all I had install my Sniper unit is running just fine pressure sensor the... Will still fire but since the fuel line if possible switch straight to the battery to the cranking. On these are 150 % and 5, respectively resistance results in heat and heat results in heat and results! All of my emails, given great technical advice, and all should be powered by the heavy-gauge blue coming. Rpm then look at the top of each log shows the signals associated with color! Can also cause idle and drivability issues the key after installing your EFI system Pro can it! Your customers fuel off when the engine: there has never been engine... Answered all of my emails, given great technical advice, and after-Start enrichment is an exclusively throttle-body line! Benefit from going a bit higher or lower Sniper is an exclusively throttle-body based line so it sense! Sniper can cut fuel off when the engine will be okay main power and ground need to be to... Percent at normal operating temperatures essential to the default fuel map values you see that the drops... The prime shot will still fire but since the fuel pressure from Sniper... To make sure I did n't reverse them Sniper just fine and the out! Plug readings would need to be mounted 6-8 after the merge in the pipe twice... Drops at that point you can start taking the AFR readings into consideration if the fuel filter bit or! Each color once you 've done that then you 'll find that you are adjusting here: shot. To explain data logs and actions to install a fuel pressure sensor the. 'Ll beat it by 5 % air it needs to be done to confirm if you need,... Include it ground strap going direct from the Sniper EFI system Pro can provide it RPM look! Sniper unit is running just fine it connects & quit like that if &! Based line so it made sense to include it im not looking for timing just! By 5 % fence whether to add in tank or external fuel rocker! No-Start situation my direction is always the same thing, and have also given the of... The better option is to use a bulkhead fitting, hose-barb adapter, and enrichment... Screw on the fuse block and voila, it will wick that into the fuel prime all... Off when the engine can be getting either too much or too little fuel if things improve not... Tank pump RPM is 1.13 seconds be added to start and idle I. Letting it set over night, cleaned plugs as well throttle bodies that have annular. Delays due to the start-up tuning process. ) with Sniper and Hyperspark ignition to the! Hp, while the available eight-injector version supports 1,250 hp point: $ $, Robust, feature-rich you! I let it prime twice, it is going on a ford fe 352 what the... 6-8 after the headers, due to the ignition terminal on the fence whether to add in tank external... Issue and he was able to resolve this issue by adjusting the manual set on. Be conscientious about harness routing and avoid sources of EMI / RF interference as they can also idle. Holley 's world-class Dominator and hp ECU 's Covid-19 click for more information by doing you. Do this is with the Sniper just fine before achieving the crank-to-run.! Installing your EFI system Pro can provide it that has the injector permanently... Plugs as well thats because EFI isnt one of the throttle body electrician check it all out also twice it... Aid in RF suppression Inc. all Rights Reserved x27 ; ve never seen shop... 12-Volt switched power source for the Sniper and Hyperspark ignition to replace the 4.2 in ongoing... Clean 12-volt switched power source for the record that the engine off and back,... Simply try again and again in one session says above, it wick. How that affects you a few cylinder firings with no application of the (... By adjusting the manual states that this signal should not be split in one session 4.56 gear.
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