I hit this list before to do a bad injector, after that I've had a problem with the high cold idle. I took the AAC valve off and cleaned it and have also sprayed into the opening with the hose off several times with cleaner. I figure its the valve because if I hit the defrost button which also turns on the AC it goes down to the normal speed around 800-1000rpm. I know the AAC valve adjusts when the AC is on to compensate for the load on the compressor. I've checked for other vacuum leaks and such. I did a good job in marking the hoses and torquing the intake down so I don't think its that, but as we all know strange stuff can happen..

Anyone have this problem and what have you done to fix it....it possible withour buying a new AAC valve. When it warms up 2-5 minutes the idle returns to normal with no other problems.

Thank for any help

Dave in Madison CT

 

its supposed to idle high when cold out to warm the engine up a bit. completely normal (unless it is high idling when the engine is hot)

 

By High idle I mean 1800 rpm

 

Thats fine, mine usually hovers around 1500-1800 rpms.

 

He is right, it is normall for you car to idle high on cold start up. Your rpms should drop to normall once the car is in it's closed loop operation.

 

Well I hate to break the new,especially if you have thought you idle was right on, but 1800 at cold idle is way to high , that means first start up and after the first few dips into the thottle it sits a 1800rpms and then will clam down to 1000 or below a few minutes later , I have a standard 5 speed which makes you pay attention to rpm a little more than automatic

 

Sounds normal to me.

 

Yeah dude, thats pretty normal. Thats what I was hitting in the winter when it was colder...

 

they're right, your idle is normal..my idle on the other hand (random 1300rpm idle, 500-1000rpm fluctuation...) is not normal sometimes.

 

Normal....normal....normal.