Holley EFI Advanced Idle Tactics: How to dial a stall free idle

[@MikeCrowe-h2i]

Your video helped a ton on my turbo coyote car. I really appreciate your videos and help! Understanding what I'm doing with changes is making this stuff a whole lot easier

[@Mid_michigan_tatoos]

Hey buddy glad to see you’re back at it!!!😊

[@greenshortsperformance]

Hope to do more. Just gotta work around these kids 😂

[@meemustang]

Thanks for walking thru these steps can't wait to start the process

[@brenpederson1233]

Beauty of a video. Trying to troubleshoot a stall. Brand new setup. Timing is good but still waiting on fuel pressure gauge to show up. I do have to give it a bit of throttle when starting “more air” but when it’s running the iac is at 5 tps at 0 idles prefect then she just quits.

[@trevize42]

Nice! Exactly the problem I been having. Wonderful explanation!

[@kevin.dbellmore2186]

I am a Holley newbie, and these videos are great.

[@jeffcurrie123]

Nice, this is exactly what I've been looking g for thank you for the great explanation

[@robair67]

Superb video. Many thanks!

[@novakenss]

My Sniper I put on in May of 2023 ran perfectly. Now in November, it is stalling when I come to a stop and sometimes stalling at cold start after fast idle. Cooler weather may have affected the IAC somehow. I'll start using your suggestions tomorrow. Thank you.

[@mxguy2438]

Great videos, how about a video on correcting a common driveability problem, part throttle/low rpm surge.

[@fallguy1212]

Great video, Thank you for the info

[@berserkerracing9974]

Great video and information. Thanks for all you do.

[@lleonardo2880]

Wow what a video! THANK YOU! I do have a question. do I need to get a lap top and the program from Holley to do the things that you did? or I can do it with my little hand held. Just to give you an idea what I’m running. I have a stock crate sbc 350 motor and still running a regular distributor and coil, no timing control in my Holley Sniper. No AC.

[@greenshortsperformance]

You can use the SD card and take that to a computer or get the cam to usb cable and connect directly. That said a lot of the tools in your toolbox are timing related. All you can really do is make IAC changes.

[@timhendrixson-s5r]

Hey Good Morning, this video is awesome now what to do if you are idling just fine and pull it down in drive and it want to die or dies every time

[@greenshortsperformance]

Make sure IAC is biased as much as possible toward zero in park, add a timing wall to the timing table and if needed increase idle timing

[@garybell6347]

I like you video I have got my idle right where I like it with your help. I do have one question when I start my engine it goes up to 2000rpm for the duration of the decay setting (no matter the temperature) how do you change that rpm setting? Thanks

[@greenshortsperformance]

Lower the IAC park position corresponding to the CTS that you’re starting at

[@trlprk]

This is very informative! Subbed

[@brianprather765]

Awesome video, I am working on trying to figure out my iac ramp down on my setup, I have a LS 5.3 and I had a automatic transmission and changed it out and I have a 6 speed manual in it now and I am having a issue with the rpm not coming down fast enough to be able to change gears, If I push the clutch in and wait a few seconds to be able to get it in gear, Do you have any advice you can give me to help me in the right direction, Thanks for any help you can give me.

[@greenshortsperformance]

I think my first question is what is your iac value at commanded idle? If zero be sure you close the throttle until you get about 1-2%. If you had zero ramp in that situation the idle should return very quickly and may even dip quite a bit. From there I would command a high idle and observe the value as in the video and set that as the hold position. From there adjust the ramp and rpm to start to get the result you want. Outside looking in it sounds like the throttle is too far open.

[@brianprather765]

@@greenshortsperformance I will have to check that out tonight and let you know, I am running throttle by cable, I will back the screw out and do a tps reset and go from there, It’s like the throttle is hanging when I push the clutch in to shift gears, I will try dinging into it and see if I can figure it out, Thanks for the quick response and the advice I really appreciate it..

[@greenshortsperformance]

@@brianprather765 No problem If you haven’t adjusted it after losing the load of the torque converter I bet it’s too far open

[@95turbostang21]

Would you be willing to help me with a swinging idle for instance when i slowly release clutch to pull forward then push clutch in my idle will hunt up/down almost stalling this is on a 95 mustang with terminator X 347 stroker, 1050 injector dynamics, Gm iac. I am willing to pay you just to help with the swinging idle

[@greenshortsperformance]

@@95turbostang21 shoot me an email [e-mail]

[@kaerlkolderman3176]

Thank you my man it really helped me out

[@DrCJ7]

Great video, Thanks... but how you think can I handle an engine going to stall, when you are decelerating and have depressed throttle with manual trans (stick), and push the clutch? It must be IAC rampdown but sometimes the config fails and my engine dies... (AMC 258 I6).

[@greenshortsperformance]

In that case you need to add throttle opening until IAC is zero or a bit past and then set the idle to start ramp lower

[@DrCJ7]

Thanks @@greenshortsperformance, I'll try with 420 RPM over idle (idle is 680rpm) and 1 Sec of Ramp Decay, IAC Hold is 16%... everything thru the 3.5" screen, because I don't have a PC to install the Holley software to adjust (Only Macintosh at home), lastly I have HEI ignition, w/no timing control, and IAC on Idle is set in 8% (6% w/ very hot engine)

[@djka8012]

I put it to 350 above idle and 10% iac hold. still get the same issue when engine temp is below 180f the iac will go up to about 25ish and the AFR will lean way out when deceleration and pushing in the clutch 😢

[@b00st_SS]

Great video, thanks.

[@lleonardo2880]

hi 👋🏽, I just installed the new sniper 2 on my car, she fired right up as it’s supposed to. I have the basic set up coil and distributor. Before the car was fired up it was set at 12°. I decided to change the timing now at 15° and now the rpm ramp up from 750rpm to 880rpm. I tried to change the basic idle back down and it won’t at all. Do I need to re-start the wizard again or? Any word of wisdom would really appreciate it. Crate sbc 350 5.7 gen1

[@greenshortsperformance]

I'm not sure I follow but if you do not have ignition timing control from the holley the only way to adjust the idle is with the idle screw on the body.

[@lleonardo2880]

So when I fired up the car the first time i have my initial timing set at 12° ran that for couple of day have my idle set at 750rpm on the handheld. Today I decided to change my timing by turning my distributor to get initial 15° my idle went up 880rpm but I have it set up at 750 on the handheld. I tried to reset it, and it won’t let me do it..

[@greenshortsperformance]

@@lleonardo2880 What is IAC %? Does the ecu control timing? have you adjusted the set screw for the throttle blades?

[@lleonardo2880]

@@greenshortsperformance The IAC is at 0% and the ecu is not controlling the timing. I watch a few video to how to set the IAC and none of them work. I’ve even tried to set the idle in the handheld at 600rpm and it wouldn’t go down at all 🤯

[@greenshortsperformance]

@@lleonardo2880 if IAC is zero (fully closed) and does not have timing control how do you expect it to lower the idle speed? It has no ability to control it any lower. Only higher. Turn the throttle blade stops counterclockwise equally until the IAC value moves off of zero

[@GL8ZE]

Are you personally running pump E85 on your car?

[@d.collier_8280]

How much idle tuning have you done on the SBF 5.0 pwm IAC? I’m struggling with my vehicle stalling when coming to a stop. I have a automatic AOD trans.

[@greenshortsperformance]

Only some. My recommendation there would be to not use it and tune hot idle without until you don’t get a stall and put in a timing wall. Then you can add it back. My only experience showed me I didn’t want any more

[@mikeydejon2148]

My car running 50 miles and hour. When i let off the acclerator the idle bumps down to 500 to 600 and wants to die? My idle is set at 750. Iac at 6 to 7. I have mild cam bigger heads 1.6 roller rockers on a 350 small block. Im thinking bumping my idle another 100 like around 850. Do you think thatll correct problem ?

[@mikeydejon2148]

Holley sniper btw

[@greenshortsperformance]

Set the rpm to start ramp a bit lower and the iac decay a little longer

[@mikeydejon2148]

@@greenshortsperformance should I set my rpm around 850 ?

[@mikeydejon2148]

@@greenshortsperformance at idle

[@greenshortsperformance]

@@mikeydejon2148 did you see my above comment. I have no way of knowing what your rpm at idle should be targeting without asking many more questions. However if you have a dip in rpm after returning to idle those are the first steps I would take. If you think more rpm is the answer give it a try. That’s the beauty of efi.

[@meemustang]

Quick question should the IAC Parked Position be ok set to 40 or should that also match the IAC Hold Position

[@greenshortsperformance]

Park position is where the IAC is during cranking. It controls how high the after start flare goes. I try to adjust it to get 1400-1500rpm startup flare for any given temperature

[@rogergm92]

Is it normal for a dbw read a close TPS 15%? I've tried changing the TPS type and recalibrating it many times and I can't get it to read below 15%. Read up it will do it right to 100%

[@greenshortsperformance]

Perfectly normal. That’s the air that the engine will idle on

[@rogergm92]

@@greenshortsperformance thanks

[@a7m266d]

Your videos are awesome thank you for putting in the effort to do this. You have really helped me a ton tune my idle and DBW properly so thank you. Since you know so much with the tuning maybe you can help me with a little project. I have an LS3 525 in a pickup with 4l80E behind it. I want to tune it to have the exhaust pop on gear change like a C8 is that doable with the terminator x?

[@greenshortsperformance]

To do that you need a large timing retard or really a cylinder cut to be able to get that reliably. Good news is the latest v3 software has torque management options for making solid shifts that could be used to similar effect

[@a7m266d]

@@greenshortsperformance Do you have an email or something we can bounce some ideas around? Your idle video is mint I spent about an hour and a half yesterday dialing my idle in and its perfect now. The return to idle is so smooth vs before!

[@greenshortsperformance]

@@a7m266d [e-mail]

[@genetownes8725]

Hey bud I love ur videos I'm a new subscriber I would like to no how do you do tuning for customers I'm not sure where ur located but the ur videos are awesome

[@sonikempire]

I have put a dominator on a supercharged V8 Mercedes motor. I just can't the idle right, it's a Chrysler/Benz TB using DBW. There is no IAC. - do the various IAC setting such as ramp down, startup IAC position, IAC parked...etc apply to a DBW system?

[@greenshortsperformance]

Yes. THE DBW body effectively does everything that a seperate IAC does just much better and faster. For a holley setup every 10% iac is 1% TPS

[@patg3424]

Great video