Rough idleing on Sri

[novanum1]

iv started to notice a rough idle on my Sri. its ok when its cold. then when its warms ups its start to idle up and down. Is there a idle mixture screw or valve that ,maybe need changing.

[Dexter]

My Gsi did the same.

IAC - Idle air control valve


It is located just after the large rubber air hose meets the inlet casing at the back of the engine but you can see it on top of the engine. Its only small and black. Next to the throttle position sensor. Its held on by 2 bolts 8 or 10mm i cant remember take it off and get rid of all the carbon **** that has collected on it from over the years. Mine ran really well after that and solved the problem.

Other than that generally the only other sensors that could cause the behaviour would be the throttle position sensor but ive personally never had a problem with these. Your ECM might be faulty but very unlikely. The next most likely cause would be the engine coolant temperature sensor. They seem to **** up regularly in my experience but the good news is that they are easy enough to change :)
Hope this helps
Dex

[Adam]

Probably coolant temperature sensors, or lambda sensor.