Poor Driveability

FAULT INDICATIONS
Poor acceleration or shudder after engine braking. Symptom is permanent (not intermittent).

FAULT TRACING CONDITIONS
Before fault tracing, ensure that:
^ No diagnostic trouble codes are present
^ The engine is at operating temperature, and
^ All fuses are clean and intact

POOR ACCELERATION
^ Blocked air cleaner or air intake
^ Poor/uneven compression
^ Low fuel pressure
^ Blocked exhaust system
^ Incorrect sensor signals