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Home >> Pontiac >> 2004 >> Vibe Base, FWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Introduction) - 1.8L (LV6) >> Description and Operation >> Fuel System Description >> Asynchronous Injection
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Asynchronous Injection

Whenever a change in the throttle valve opening exceeds a specified value, as determined by the PCM, additional fuel is injected simultaneously into the cylinders which are in the intake and exhaust strokes. This is in addition to the above synchronous injection and is not based on the ignition signal.