I have a 2000 4runner with the 5vz-fe motor (6cyl). The check engine light comes on periodically and the engine will idle high (around 1800 rpm). Alternatively, on some days when I try to start the car it will start roughly or will immediately stall out. If I give it a little gas it will start up ok. As soon as I shift into gear the rpm drops to what seems like a normal speed and the car runs fine.
A mechanic read the engine code and told me that I had to clean (or possible replace) my throttle motor (this mechanic was not a Toyota specialist). Unfortunately I do not know what the actual code was.
I got the Chilton guide and realized that my engine uses an IAC valve instead of a throttle motor. The guide warns not to clean the IAC valve however.
My question has two parts. The first is whether the symptoms could point to a faulty IAC valve? The second is whether the valve can be cleaned (in spite of what Chilton says)? Is there a reason why the valve should not be cleaned?
A mechanic read the engine code and told me that I had to clean (or possible replace) my throttle motor (this mechanic was not a Toyota specialist). Unfortunately I do not know what the actual code was.
I got the Chilton guide and realized that my engine uses an IAC valve instead of a throttle motor. The guide warns not to clean the IAC valve however.
My question has two parts. The first is whether the symptoms could point to a faulty IAC valve? The second is whether the valve can be cleaned (in spite of what Chilton says)? Is there a reason why the valve should not be cleaned?