Misses Under Load

Definition
Steady pulsation or jerking that follows engine speed, usually more pronounced as engine load increases. The exhaust has a steady spitting sound at idle or low speed.

POSSIBLE CAUSE ACTION

Contaminated fuel Check Water or excessive alcohol in fuel.
Replace Drain fuel tank and add clean fuel



Low fuel pressure Check - Fuel pressure.
- Fuel filter restriction



Pinched or collapsed fuel hose/ line Repair/replace As required refer to
FUEL SUPPLY/ RETURN OR EMISSION PIPES/
COMPONENT REPLACEMENT AND REPAIR
in FUEL SUPPLY AND AIR INDUCTION





Inoperative fuel injector(s) Check Injector(s).
Perform: - Injector driver circuit test.SEE
- Injector balance test.SEE
- Injector service (cleaning)