Originally Posted by JapEatr

Trim your MAF

Originally Posted by 06blackg85ss

Yeah my car used to do that random ol rich idle with the 272s but it was very random. This car just goes dumb lean but doesnt come out of it for some reason.

Originally Posted by Area47

don't full disable the rear o2 and cat codes. just no mil light option.

Originally Posted by armcclure

May I ask why without being flamed?

I don't even HAVE a rear o2; unplugged, sealed connector from the weather, and "no mil".
Haven't had any problems at all...

Originally Posted by zrated89

avise what year is your car? Depending on year that could be your issue right there man.

Originally Posted by advise

I believe my idle hunt is causing my issue With seeing low vacuum
Because at wot I'm seeing 21-22psi wot so i doubt its a vacuum leaks
On decell I see 19-20in hg

My tuners gotta work out my maf as I'm maxing it at 7100rpm

Originally Posted by 06blackg85ss

timing was going negative a bit at idle, didn't really have much of a chance to get that straightened out as the car would barely run after a shut and cool down cycle.
MAf was rescaled
as for idle trims it was -12.5 which of course was not the finished product persay, but we got stuck on the other issue before I got to clean that up more.
I"ve run into a similar issue before as state with infe's car, but his was more random, and it would go back to normal if you blipped the throttle. Still waiting for his motor to come back to the machine shop to clear that up

Originally Posted by 06blackg85ss

it was pulling even less vaccuum at a smooth 950 rpm idle (was around 0)
Issue started before the idle hunt crap (which started up after messing with it of course)

Originally Posted by advise

Ya confused as how everyone else is running 15in hg

Originally Posted by 06blackg85ss

yeah your car does seem to have really low vac at idle, infe's car was @15hg also

Originally Posted by mrbelvedere

when I had that problem it was because of a vacuum leak pre blower once fixed it quit idling in neg timing

Originally Posted by Area47

for sanity checks the ecm does. the main cause of random afr changes while cruising or at idle is the ecm running tests on the rear o2's and cat.

Originally Posted by armcclure

Ah. Are there some that the adjustable ECT threshold doesn't eliminate?

Originally Posted by armcclure

Ah. Are there some that the adjustable ECT threshold doesn't eliminate?

Originally Posted by Area47

the rear o2 test and cat test are not adjustable. one of them we don't have access to shutting off anyways. which is why i stopped changing the cot temp threshold to max. left it stock and changed the enrichment rate to 1.0

Originally Posted by zrated89

Paul and advise pm Taylor he's got the stage twos idling and driving great with a huge as port job as well. Maybe he can offer some insight to y'all's ordeal

Originally Posted by zrated89

gotcha sounds like he has some unseen issue going on

Originally Posted by zrated89

yea sometimes flakey stuff will pop up though man. Im in the same boat right now lol

Originally Posted by 574

I wish I was still in that boat