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Home >> Chevrolet >> 2002 >> Impala Police >> Repair and Diagnosis >> Engine Performance >> Engine Adjustments >> Idle Speed & Mixture >> Idle Speed (4-Cylinder) >> 2.2L (L100, L200 & LW200)

2.2L (L100, L200 & LW200)

Turn ignition on with engine off for 10 seconds. Turn ignition off for 10 seconds. Start and operate engine at idle for 30 seconds. Slowly vary engine speed between idle and 3500 RPM 2-3 times. Return engine speed to idle. PCM will now properly control idle speed.