Toyota Avalon Problem Report
Toyota Avalon Improperly Adjusted Valves May Cause Emissions Failure/Rough Idle
A rough idle and even an emissions inspection failure for high HC and CO can be caused by improperly adjusted valves. Also, exhaust valves may become to tight which can lead to valve failures. Our technicians tell us that regular valve adjustment inspections are a must.
need valve adjustment - Visitor
Debris can get into the idle air control valve. This will restrict the air flow into the engin...
How do you get to the Idle Air Control Valve to replace it?
High idle up to 2000rpm when it's cold, after warm up for a few minute,engine run normal at 800...
Have added carburetor/injector cleaner to tank. Took car to mechanic when idling roughly but w...