Weird acceleration problem - Toyota Nation Forum : Toyota Car and Truck Forums

dstlaurent · 06-27-2005, 11:34 AM

When the engine is cold ... the acceleration is very weird (low and hi acceleration) ...

SYMPTOM:
The RPM go up like a stair ... in step ... example 2000 to 2100 and 2100 to 2300 RPM ... no middle ... and only when the engine is cold ...

do you know this problem ?!

Thanks

Skunkworks77 · 06-27-2005, 11:49 AM

Check the IAC valve. See if it is sticking.

dstlaurent · 06-27-2005, 10:35 PM

I know where is the IAC valve, but how i can chek if is sticking, and what i can do if is the case ....

Skunkworks77 · 06-28-2005, 12:24 AM

Remove the two screws and there is a pin inside. Turn it with your fingers.

dstlaurent · 06-28-2005, 07:00 AM

Ok i will do that, before ... i have to change the gasket of the IAC after the manipulation ? And if the valve if realy sticky ... i put WD-40 or other lub on it ?

Skunkworks77 · 06-28-2005, 07:48 AM

No need to change the gasket. Just open it and twist the pin loose. No need for grease either.