Acceleration Enrichment

As the engine is accelerated, a momentary lean condition exists as the throttle begins to open (this is due to the fact that fuel is more dense than air and cannot move into the cylinder as quickly). To prevent a stumble or hesitation, the ECU uses an acceleration enrichment fuel strategy. When the IDL signal goes from on to off, the eCu delivers an acceleration enrichment fuel pulse.

For Conventional EFI

ON

1

OFF

! 11

For EFI/TCCS

Injection Signal .

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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