Cold idle stall

[SuperSuburban]

Looking for some help. everything runs good. shifts good. the only issue I am having is when it is below 28 C it will stall in gear at low idle. when it warms up it idles fine. you can hear the engine rpm dip a little low but it will pick it up when warm. not when cold.

Tune and fresh log from this morning attached.

TY in advance

[edcmat-l1]

How bout a little background on the vehicle????? WTF is it and what's been done to it?

[STAGEUP]

How bout a little background on the vehicle????? WTF is it and what's been done to it?

You're telling me you can tune, but can't read minds???

[edcmat-l1]

You're telling me you can tune, but can't read minds???

I got you!! LOL

[SuperSuburban]

How bout a little background on the vehicle????? WTF is it and what's been done to it?

Sorry - 6.0 L LQ4 - built with 2 stage cam. had a tuner build the tune. pulle dengine from Suburban and put in 2006 H2 hummer. new transmission. playing with the idle speeds but still have the issue when cold.

[edcmat-l1]

Sorry - 6.0 L LQ4 - built with 2 stage cam. had a tuner build the tune. pulle dengine from Suburban and put in 2006 H2 hummer. new transmission. playing with the idle speeds but still have the issue when cold.

It pretty much needs tuned. And you're not logging the proper pids to get the idle straightened out. Do you know how to save and open a channel config?

PS hope you didn't pay for that as anything more than "this will get 'er fired up!"

[SuperSuburban]

It pretty much needs tuned. And you're not logging the proper pids to get the idle straightened out. Do you know how to save and open a channel config?

PS hope you didn't pay for that as anything more than "this will get 'er fired up!"

I can save and open a channel config. paid full pop for that tune.

[SiriusC1024]

Focus on tuning VE and MAF. Worry about fine-tuning the idle after.

But first, which injectors? What cam? Injection timing hasn't been touched.

[edcmat-l1]

It does need a complete tune but one specific adjustment should cure your one complaint about the cold start stall.

Most likely cause it not enough base running airflow. Flash this see if it's any better. This is not an end result tune file it is a single change to yours.

Also attached is a better channel config file for you.

[SuperSuburban]

after tune it still stumbles and stalls. see attached logsept 8 log.hpl

[edcmat-l1]

I don't see a stall. Close a couple spots but no stall. I also see you're trying to aggravate. Like I said it needs a bunch more work.

Try starting it and putting it in gear without whacking the throttle. When you do that it's already rich and you're giving it a quick shot of fuel and then shutting the blade. That's a completely different set of circumstances than "stalls in gear when cold".

Like I said before it needs a lot of work.