firechicken76

iTrader: (14)

Engine is a 2002 ls1/6 car is a 84 trans am
has prc 5.3 heads and a ms3 cam. bolt ons too
t56 9" etc...

My issue: When i start the car the rpms shoot up to 2k-3k they hold there for about 3-5 seconds. if i put it in gear it does it again, it will repeat this a few times, then it goes away. It only does this when i initially start the car, if im driving it and go to a stop sign, it wont do it. BUT if i shut the car off, and turn it back on, same thing.

im running a scanner tool on my phone through the obd2, im not getting any check engine lights, and the car WAS tuned when i first put the combo together. the temps are what they should read when the key is turned on, but the car isnt running. I did notice my throttle position sometimes is anywhere between 0% and .8%

thanks for taking the time to read this.

HappySalesman

iTrader: (3)

What are the IAC counts? (Or did you go DBW TB?) COuld be that the IAC is going as far open as it can and getting stuck.

07NBSChevy

iTrader: (1)

Possibly IAC, MAF Sensors. Throttle Body may need cleaned.

Old Geezer

iTrader: (3)

There's a tune/diagnostic forum for ?'s like these.

Darth_V8r

iTrader: (4)

Do you have access to HPTUNERS or EFILIVE?

It sounds like too high a commanded IAC park position and too much start up air adder in the toon.

firechicken76

iTrader: (14)

i dont have access to tuning software, i thought it was a bad iac valve, so i replaced it, that didnt help. is there any way to check my iac counts without tuning software?