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.

Preliminary Check

Ensure following preliminary checks have been performed:

Visually inspect engine compartment to ensure all vacuum hoses and spark plug wires are properly and securely connected.
Check all wiring harnesses and connectors for damaged insulation, burned, overheating, damaged pins, loose or broken conditions. Check sensor shield connector. Ensure DIS module mounting screws are tight.
Ensure battery is fully charged.
Turn all accessories off during diagnosis.