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
Backfires
Symptom: Fuel ignites in the intake manifold, or in exhaust system, making a loud popping noise.
POSSIBLE CAUSE ACTION Exhaust system leaks
^
Visual inspection
Incorrect Air-Fuel mixture
^
Check
fuel pressure.
^
Check Air-Fuel ratio.
^
Check
O2 sensor output.
^
Perform injector balance test (SFI only only).