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 and Afterfires
Fuel ignites in the intake manifold, or in exhaust system, making a loud popping noise.
POSSIBLE CAUSE ACTION EGR open all the time,
Check EGR system in "Testing
leaking gasket
Procedures" in Emissions
Air management valves,
Check Air Injection system in
Deceleration valve,
"Testing Procedures" in Emissions
Check valves malfunctioning