Backfire (Exhaust)

CONDITION
^ Backfire (Exhaust)

POSSIBLE SOURCE
^ AIRB valve malfunction.
- Perform AIRB valve diagnosis. Go to pinpoint test step AIR7. AIR7 - Check For Vacuum at the AIRB Valve

^ AIRD valve malfunction.
- Perform AIRD valve diagnosis. Go to pinpoint test step AIR12. AIR12 - Visually Inspect AIRD Valve

^ AIRB/AIRD solenoid malfunction.
- Perform solenoid diagnosis. Go to pinpoint test step AIR27. AIR27 - Check Air Solenoid

^ Exhaust manifolds or pipes loose.
- Inspect and tighten nuts or bolts to specification.