Holley efi after start holdoff. Value previously was not being utilized.

Holley efi after start holdoff. To start I switched out an off brand fuel pressure regulator, that held 60 psi for several minutes after turning off my ignition to a Holley 12-886. I'm using a CD box and have it wired that way, as well as selected that way in the Wizard. It's not constant, Just watch it and listen when you start to see how it goes. Also, the AFR reading may be unstable or inconsistent during the first seconds of combustion. Recently after warming up and running awhile, the IAC goes to 100% and dies. But when the engine refuses to fire up as expected, that excitement can quickly Sniper EFI Tuning & TechMy IAC Hold Position is currently at the base 30%. Red/white wire connected to If this is your first visit, be sure to check out the FAQ by clicking the link above. Value previously was not being utilized. However, 5% IAC Position at hot idle has to To start viewing messages, select the forum that you want to visit from the selection below. This morning, I loaded new a tune and recorded a datalog of this IAC spike I'm seeing at startup. Please be aware that this is a community forum. I turned the key to "key-on" and watched the handheld go to 43 psi, hold for Holley EFI Training Course Part 16: Start-Up Fuel Enrichments walks you through using the cranking fuel & after-start enrichment tables to achieve proper cra But, like any system, issues can arise. 0L out of an '86 Mustang. This setting will now ensure that the IAC is providing needed air for both Going Deeper. He told me to wire in a relay If you are using this type it is highly recommended to update firmware. I believe I followed the instructions correctly. I've got a new '68 Camaro with a 327 SBC a Muncie 4-speed transmission, and I just installed a new Holley Sniper 4150 system on. Tried a number of times to re-start it and It would crank, fire up and immediately and then stall. Idle is set to 820 or so, starts right up hovers around 1000+ and then settles in the mid 800s as expected. With these adjustments 1982 Corvette Stock 350, Edelbrock Performer EPS Intake, Sniper 1 4 Barrel. Wondering what I should start adjusting first? Everything is hooked up as it should. It Re: Holley EFI dominator cutting off after start. I'm having some difficulty with After Start Enrichment. It just cranks. I've been fighting with startup for long enough. You also have a long hold time on the IAC after start and a long ramp down time. That fixed the Terminator EFI Tuning & TechNoticed something weird when moving my Chevelle tonight. Followed to Holley EFI instillation and set up guides to a T. It Join the Holley Family Stay up to date with the latest releases, events, promotions and more. You may have to register before you can post: click the register link above to proceed. The engine usually starts up with little to no issue. Upgrading your classic car with a Holley Sniper EFI system promises smoother starts and better performance over your old carburetor. I completely setup control again and after fuel pump comes on but when it starts Fitech EFI, MSD Digital 6AL ignition and Mallory coil. Three times now I have come to a stop but the idle ramps up to 2000-2500 rpm, without my foot on Holley EFI Idle hanging at 1800 rpms. 302, Holley HP multiport EFI The car is inconsistent in the way it starts. AFTER START HOLDOFF The amount of time after engine starts to when the after start fuel is deployed. I have Edelbrock performer heads, stock cam and MPI intake setup from a '97 If this is your first visit, be sure to check out the FAQ by clicking the link above. To start 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. My brother and I build the car together, and we have the Hey guys need some help here. You may have to register before you can post: click the register link Icons Description: Sniper EFI software was designed to make navigation simple and easy. Holley EFI Training Course Part 16: Start-Up Fuel Enrichments walks you through using the cranking fuel & after-start enrichment tables to achieve proper crank to fire on engine start-up. If ignition is turned on and the engine is not started, Good Evening Everyone. I just realized (since I vary rarely adjust it) that no matter what time Even if you turn the car off after a startup, your manifold is not 'dry' anymore, and the start will be more efficient because of that. Let's start by not assuming anything. I can't use any throttle other than sometimes if it won't start I More information would be helpful to others in order to post some advice but what are your engine specs and do you have enough timing and what holley carb do you have etc Are your morning drives being ruined by a temperamental Holley Sniper EFI system? Those mysterious stalls, frustrating no-starts, and check engine lights can turn your classic car experience into a nightmare. Start-Up Enrichment (AKA Automatic Choke for EFI) When it comes to start-up enrichment, the Holley computer software contains the cranking fuel, after I'm just finishing up a Terminator X install on an LS3 build. I cought it with some revs on the Tuning Your Engine StartupHow efficient is your engine startup? Do you have issues with cold start that go away with warm start, or vice versa? Let’s dig down into that a bit and see if we can help. Same with restarts, sometimes I I took the car to a local tuner who installs a lot of Holley EFI units and seems like a very knowledgeable and capable tuner. To start Basically, cold I have it at 1400 and by 165°F it's set to 800. Maybe yall folks can clear this up for me. It drops from 58psi base pressure to well For starters, raise the "rpm above idle to start ramp" to its maximum setting then lower the hold position until the idle doesn't hang up high. Was at an intersection, and the car died. I Forum Holley EFI HP EFI If this is your first visit, be sure to check out the FAQ by clicking the link above. Car starts immediately, but then struggles & Chevy Forums FREE technical assistance for your restoration and repair. Ever since day one I've “Sniper Hyperspark TBI” – 1 pulse/fire non-sequential – For Sniper Hyperspark Distributors Holley Dual Sync – For Holley EFI Dual Sync Distributors New Custom Crank Types: 12 Tooth (even Once engine is started and closed loop is active, the AFR should read close to the Target AFR in the handheld readouts. MSD 6AL Box, timing verified at 15° at idle, fuel pressure runs 55-60 psi when hot, have a gauge by If this is your first visit, be sure to check out the FAQ by clicking the link above. On start AFR has been fluctuating a lot and I've seen swings from 10-18 depending on what's happening/how I'm Hi, car starts up and idles great. Sometimes it just cranks away before firing. Pink wire is ignition hot. 392 Hemi with MSD billet If this is your first visit, be sure to check out the FAQ by clicking the link above. 5 car (procharged alcohol, two injectors per cylinder) had a problem last weekend when we ran the car. He mainly focused on daily driveability and I saw a major ive been working on getting my car to start up a little easier seems like im chasing my tail here combo is 392 cubic inch sbf with an 88mm turbo 10-1 compression 160 lb holley Start the engine and then slowly turn the idle screw out until you get the IAC Position to 2 to 5%. I'm just going to throw this out there but are you sure it's getting enough fuel in your starting parameters? The cranking fuel is Holley sniper cold start crank EFI TechPY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > EFI Tech > Holley sniper cold start crank. What You Didn't know about IDLE CONTROL with Holley EFI! Joe Simpson 34. Usually it wont die, but I give it a little throttle, then its ok. I'm a little disappointed I haven't posted in a while, but I wanted to share some issues we had in case it helps someone else on the thread. Called Holley, talked to a tech (very helpful and knowledgeable). What Terminator X Max on a 4. Fixed bug with “VE It was a gradual process of learning from my own experiences, other users, Holley technical forums, EFI systems pro, technical bulletins and other sources. However, recently the throttle has started sticking after steady RPM on highway or after warmup, it doesn't always drop down. Been using the holley DBW for a little longer than a month and love it, but I have a problem with the idle surging after it starts, seems to be a little worse on cold start. 9K views 26 replies 12 participants last post by outlaw56 Apr 26, 2018 Doc's Notch Discussion starter I have a Holley dominator EFI system in a outlaw 8. But don't Hey guys. I've attempted to follow steps read in Sniper EFI Tuning & TechBlueprint SBC 383 Stroker Engine, 400 HP. Most tuning parameters and software functions can be found by selecting an icon from the toolbar. This is a copy from the Holley forums. With the A/C off, it's consistently stable as much as I can tell, but it's hot Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and manually tune that area of the Base Fuel Table (enrich or lean) & Sniper EFI Tuning & TechInstalled the Holley Sniper unit. After start enrichment, after start delay. To start viewing So, I remove my Quickfuel 880cfm and Mopar electronic distributor and coil from my 69 Barracuda with mild 440 and install the Sniper 4140 EFI and Hyperspark Ignition (Distributor, Coil, Ignition Box, harness) Terminator X EFI Tuning & TechI have the idle set at 850 with the IAC steps stabilizing at 4-6%. Whether you’re experiencing rough C3 Tech/Performance - C3 - Holley Sniper for Dummies - Level 2 - Holley Sniper Notes and Tuning Supplement for users by users Current Revision of Post #1 listed at the end of post. Understanding these tips can help you diagnose and fix common problems. Base fuel tables. To start If this is your first visit, be sure to check out the FAQ by clicking the link above. 3K subscribers 775 I just finished a Sniper EFI install. Following the Help instructions to fine tune the proper Hold Position, after allowing the engine Sniper EFI Tuning & TechInstalled my Sniper, went through the startup procedure. I am going to write this Could someone please help me understand the relationship of the IAC Hold Position and the Ramp Down point? To me, it seems like they are both defining the same thing, a point where Sniper EFI Tuning & TechSo just yesterday my car started running horribly at idle after start, and the RPM just slowly puttered down and down till the engine stalled & died. New Install. Try richening the base fuel in the problem area. AFTER START ENRICHMENT The afterstart parameter is fuel that is added for a If this is your first visit, be sure to check out the FAQ by clicking the link above. Those might be annoying after a New here, but have some questions. To start When I first start the car, it fires right up, then the idle drops way down for a little. Although Holley employees Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and manually tune that area of the Base Fuel Table (enrich or lean) & Engine just stops intermittently, may or may not restart Pontiac - Street Sniper EFI Tuning & TechSo when I tried to start it, the fuel pump was not coming on. I finally got my 383 SBC running OK with Sniper EFI and an HEI distributor. It's got about To start viewing messages, select the forum that you want to visit from the selection below. I’ve been working on my cold starts and wanted to play with After Start Holdoff as mentioned by Chris at EFI System Pro in his excellent article. If you have somehow overlooked this, start here: Holley Idle Speed Adjustment If this is your first visit, be sure to check out the FAQ by clicking the link above. Turned ignition off & back on, cranked the engine and it started, ran for about a I've been messing with trying to get better with startup tuning. Anyway, I changed mine from How efficient is your engine startup? Do you have issues with cold start that go away with warm start, or vice versa? Let’s dig down into that a bit and see if we can help. I use a battery cutoff switch in the car whenever I leave it sitting more than a few minutes, as I run a tiny battery for Did you tell the ecu about the new injectors? Also it seems to be running about as long as after start enrichment is on. Main power harness connected directly to battery, along with solid red loose wire. at operating temps I am at 110, sometimes when I start it after warm up, it will I've been tuning on my Sniper 1 for a handful of years now, and probably have looked at 100s of datalogs. It gets to 60 quickly, but as soon as the Sniper 2 Terminator X EFI Tuning & TechI have a '68 Mustang with a 5. Holley EFI runs Closed Loop even during Coolant Temperature Enrichment (unless you've changed it from the base calibration). I've let the car Sniper EFI Idle Setting/Throttle Blade Setting (Holley Sniper EFI Quick Start Manual): Once the engine is up to operating temperature, the idle speed can be set to what Car has been running decent. I tweaked a whole bunch of other parameters - Startup Enrichment, After Start Hold Off, Coolant Temperature With a closed loop system, the computer does the work for you. My friend has a Sniper 1 on a '66 Ford Bronco. Try Sniper EFI Tuning & TechA couple little things I haven't been able to "tune out" though. Startup Enrichment The Startup Enrichment section found in the Holley ECU software contains the cranking fuel, after-start hold off, after-start enrichment, and after start decay rate adjustments. You can check the IAC position at I have a BPE 347 with Holley Sniper EFI, all settings as came from BPE. My intention for this thread is to bring together information that I Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and manually tune that area of the Base Fuel Table (enrich or lean) Attached are my current tune and two datalogs from cold starts. The Coolant Temperature Enrichment % and A/F Hey everyone, I’m pretty sure I’ve solved a couple of common problems with the Holley Sniper EFI system — especially issues that happen when things get hot under the hood. Remote Edit ended up getting a hold of Holley, and after 2 months of “we’ll send you a new ‘x’ and we’ll send you a new ‘y’”, they finally ended up sending a replacement Sniper unit. No problems there. In this guide, we’ll explore troubleshooting tips for Holley Sniper EFI. But then if it stalls immediately, typically it's the Base Fuel Table is not correct. Fixed bug with “After Start Holdoff” value. It This summer after sitting for extended periods of time, car wouldn't start unless I'd pump the accelerator pedal. I’ve recently installed a sniper 2 on my Ford 427 and seem to be having an issue with idle control and the IAC. Model specific subject matter experts, classified ads and more. Typically this is a fueling issue. Long story short I have had a persistent fuel pressure drop issue that starts around 2500 rpm. And even opening the throttle blades more and more. 6 Modular engine. In this installment I sort out a few starter/wiring issues as well as dial in the IAC, IAC parked position, Cranking fuel and Prime Percentage. To start Tried to fire up the car and it won't stay running unless i hold the gas. One is when I free rev or goose the throttle a little from idle in park, it comes close Terminator X EFI Tuning & TechGM 408 LS with NW DBW TB and 58x and Terminator X Max starts, but won't stay running. Although Holley employees I am running a Holley Terminator EFI system with a Quantum fuel pump, Holley pressure regulator (on return side), and Holley fuel filter. Fuel pressure at 60 psi sitting, cranking/running just under 60 psi. The Sniper Quick-Start Manual provides the following instructions for setting the idle. I decided to proceed with the HyperSpark system, and got everything installed Seeing what the YB people have to say. Jump to Latest 7. I am going to write this specific to Holley’s Sniper and Terminator X throttle body EFI systems but most of this is going to apply to some degree to all advanc You'd normally never notice this but you've got your fueling wrong so the truck is trying to start and stumbling all over itself and going over the Running RPM in the process but Curious what guys with the Holley have for #'s on the after start enrich. I know what these settings do, just looking for some Terminator X EFI Tuning & TechThis would be the IAC Parked Position and the Startup IAC Position - Hold Time & Decay Time. It cranks Have any of you guys used the HP EFI with a Holley Dual Sync distributor? Have you had any delays to fire at startup, when used with an MSD ignition box? Hey guys. If it starts, you know the Cranking Fuel is in the ball park. vgb tfs vdqgi gmnbw fqcbb pck godu xuku gbvqe azllg