Help: Hign engine idle

[austen.holton]

Hi guys and gals. I am new to the LS1 world ,so please help me the best you can. I have 01 Formula ram air. After my car is warmed up and runs for a while, it starts to idle higher and when I have it gear I can let off the accelerator and the car will keep going at the same idle. Please point me in the right direction.

[sunsetorangess]

How high is the idle going? How many miles? Any mods? You can pull the IAC motor and clean it, they build up with grime and carbon and sometimes stick. I would also clean your MAF and Throttle body while its open..
J

[Cutlass]

check your PCV hose. They like to deteriorate in this area and PCV housing right next to it. It'll cause a vacuum leak and high idle

[som ss 2001]

I am having the same prob. My 01 has 195,000 miles on it and this is the only problem i have ever had on this car. I have cleaned both TB and MAF. I have replaced the IAC and the other one under it(forgot the name ) I had my o2's checked out and was told they were running fine. I've checked for vacuum leaks and nothing. I replace my pcv every other oil change. This is starting to really drive me nuts. I love driving this car, but this is not helping. I don't know what else to look at.

[c5z28]

I am having the same prob. My 01 has 195,000 miles on it and this is the only problem i have ever had on this car. I have cleaned both TB and MAF. I have replaced the IAC and the other one under it(forgot the name ) I had my o2's checked out and was told they were running fine. I've checked for vacuum leaks and nothing. I replace my pcv every other oil change. This is starting to really drive me nuts. I love driving this car, but this is not helping. I don't know what else to look at.

You should start a new thread
but how did you test? Take it to a shop where they put a sniffer to it or did you run the car and spray ether around the manifold? Ever mess w/ the manifold?

[som ss 2001]

The manifold has never been messed with. I had the 02's checked out on the shops laptop. It said hp tuner. I was told they were good. what do you mean spray around the manifold?

[c5z28]

The manifold has never been messed with. I had the 02's checked out on the shops laptop. It said hp tuner. I was told they were good. what do you mean spray around the manifold?

o2's aren't associated w/ vacuum leaks. If there is a leak in the manifold it will cause a higher idle, if you spray ether around suspected points of interest and there is in fact a leaking gasket you will hear the motor idle go up. Out of curiosity you ever replace your fuel filter? Don't think it would cure it but...

[som ss 2001]

I change my fuel filter and pcv every other oil change. I have not heard any sucking sound coming from the motor. I will check the manifold for any leaks. Thank You.