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; Testing and Inspection

^ Blocked exhaust system.
^ Incorrect sensor signals.
^ Excessive carbon on intake valves