October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Engine Misfires

Check EGR system.
Ensure proper spark exists from ignition system.
Ensure ignition timing is correct.
Check engine compression, valve clearance, valve timing and timing belt (if equipped).
Check fuel injectors and cold start injector (if equipped).
Check airflow meter or vacuum sensor and wiring.
Check Electronic Control Module (ECM) and wiring.