Backfires and Afterfires

Fuel ignites in the intake manifold, or in exhaust system, making a loud popping noise.

POSSIBLE CAUSE ACTION



ECCS system Refer to On Board Diagnostics malfunction. in "Testing Procedures" in Emissions
to extract trouble codes.



EGR open all the time or Check EGR system in "Testing
leaking gasket. Procedures" in Emissions.



Air induction valve Check air induction system in
always operating. "Testing Procedures" in Emissions.



Anti-backfire valve Check anti-backfire valve in
not operating. "Testing Procedures" in Emissions.