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
Fuel ignites in the intake manifold, or in exhaust system, making a loud popping noise.
POSSIBLE CAUSE ACTION EGR open all the time,
leaking gasket
1. Check EGR system.
If OK, proceed to step 2
2. Check
EGR electronic controls.
Air management valves,
Deceleration valve,
Check valves malfunctioning
Check Air Injection system (if equipped)