Question about 2003 Toyota Corolla
'03 Toyota Corolla 1,4 VVT-i 4ZZ engine idle rpm too low, shaking. How can be adjusted?
Idle is factory set and cannot be adjusted, your best bet is checking for cracked hose pipework for air intake at idle,(not at problem under exceleration and driving) Any slight upset to the air /fuel ratio will be most prevelent at idle speeds.Check hoses where the meet metal flanges on manifold intakes and any sharp bends in ppipes.Good luck
Posted on Apr 05, 2010
Check your idle speed control valve situated at the bottom of the throttle body. Sometimes the valve sticks and will make the engine rev high or low at idle and the ECU can't adjust it properly.
Posted on Sep 09, 2010
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