Normal / Low Idle

[Flash]

I recently changed my fuel feed line to -6AN from the tank to the rail along with a new fuel filter. I disconnected the battery to work on my car (you all know what happens to DSMLink when that happens).
Anyway, today I reloaded my tune on my ECU and went for a drive. I noticed that when my car is in 'P'ark (Bone stock automatic), the idle is fine (950rpm). When I put my in 'D'rive and drive around it feels fine, but when I pull up to a stop light the idle drops to the point it is fighting to stay alive. I can then accelerate away from the light with no real problems.
I am just confused. Because before I began to run my new fuel lines and disconnect the battery, the car drove just fine. This is a time span of yesterday night when I started and today when I finished.

-I already cleaned my ISC. If the ISC was bad then the idle when in 'P'ark would be bad. Correct?

-I am venting my BOV, but I have been all along and don't plan to change until I get a new FMIC, pipes and GM MAF.

 

[absolute_DSM]

Well for one, you dont vent that BOV without the GM Maf.

Youve never had problems with that?

 

[darkstar1313]

I am having the same problem. It only seems to happen when I am driving around under boost. I am not venting to the atmosphere. But it does sound like the same thing. I going to go back through everything tonight. I will let you know if i find anything.

 

[Flash]

It is weird that the car ran fine before I started my fuel lines and filter replacement. Then upon completion, my car has a weird idle.

 

[BoostFrenzy]

Mine does the same thing. I'm vented for now too. Sometimes when i clutch in too late when coming to a stop, the revs drop down to almost dieing. (not as in clutch stopping engine). But it only does it sometimes. Like when it is cold the idle will drop fast when shifting, but when it is fully warmed up i don't have a problem with either of them. For me, i think its because I'm vented. You know the whole you run rich when vented during shift and when you let off thing. So that could be part of your problem. Its either that or a tune that is already too rich.