Cuts Out, Misses

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.

CHECK:
- Vacuum hoses for splits, kinks, and proper connections, as shown on vehicle emission control label vacuum diagram.
- Air leaks at common chamber and intake manifold gaskets.
- Ignition wires for cracks, burned spots or burned ends, hardening, correct firing order, and proper resistance.
- Wiring harness for bare spots, pinches, cuts or corroded connections.
- Fuel pressure.
- Water contaminated fuel.
- TPS for binding or sticking.
- Ignition timing. See Vehicle Emission Control Information label.
- Air flow sensor.
- Alternator output Voltage.
- For open ignition system ground.
- Canister purge system for proper operation.
- EGR valve operation.
- Clogged fuel injectors.