Can anybody list the correct idle RPM settings for a '91 305 TPI A4 while:

1) In Park
2) In Drive
3) In Neutral

I'd like to know the targets for when the car is cold and when it is hot if possible.

After de-carboning the IAC motor and TB I am running at 1500, 1000, and 2000 respectively. These values seem to drop about 250RPM after the car gets hot.

I know these settings are high and would like to lower them, but not so much that the car stalls when coming to a stop while in drive, which was what was happening before the IAC cleaning.

-Matt

 

I'm not postive, but I think when warm in D around 600rpms. In park around 800rpms.

 

i get about 600 in drive and 1000 in park and nuetral
87 tpi auto

 

I get about 900 to a 1000 in park and a 600 in drive when cold
and 800 in park and 600 in drive when warm

 

ive got my idle turned down and im idling at 500 in drive and about 650-750 in park. it purrs at those levels, sounds really docile (sleeper)

 

OK, thanks guys. I'm going to go through the IAC reset and see if I can get this more on target.

-Matt

 

Besides the temperature, what would make a car idle so high like 1000rpm or more??
BTW mine idles like 600 or so.

 

what could make you idle that high? well a lot of things, 1 your in open loop and it is warming and the iac is letting in air, 2 your iac is stuck open, 3 vacume leak, 4 you have your min air set too high