Je357

My rpm stick around 3 k when it's hot out in traffic. But once I start moving and get some open road. Car is normal. Sucks when this happens cause I have to keep foot firmly on brake cause car wants to go really hard once I let off brake. I have no check engine light. The throttle plate is clean. Car idles fine in the morning. Even all winter nothing happened. Only have this problem in summer time?

Karanx7

iTrader: (2)

Kind of hard to diagnose if it's intermittent. Might be best to take it to a mechanic. Try checking the IACV.

YeuEmMaiMai

plug in a scan tool that has real time data ability and see what is going on... sounds like a TPS failure to me or a vacuum leak

CL-S progression 01

iTrader: (2)

Vac leak I would guess.

But usually it's the other way around the warmer the car is the more the idle drops. I agree with yeuemmaimai with the real time data scanner.

Or else you may waste hours and hours beating around the bush

cl82793

had this happen too, definitely heat related . would be interested in diagnosis or replies.

mpgilroy77

I've had this problem on my 01 CLS for the last couple of years. Bumper to bumper traffic in 70+ deg weather and it creaps up slowly from normal idle to 2200 rpm. I actually drove it into the Acura Dealer with the idle at 2000+ rpm. They can't figure it out. I've replaced two idle control valves, and after they wanted to swap it out again, I got ugly and now they are telling me it is the throttle body sticking. They cleaned it out (again) and its been OK, but I had this just happen again where I got stuck in traffic due to an accident.