Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Port Fuel Injection

If diagnostic procedures call for replacement of the ECM, first check that the installed PROM or MEM-CAL is the correct part. If it is correct, remove PROM or MEM-CAL from the defective ECM and install it in the new ECM, as the new ECM will not contain a PROM or MEM-CAL. When reconnecting power to the ECM, the ignition switch must be off to prevent internal ECM damage.