Checks
| Action
|
DEFINITION: The fuel ignites in the intake manifold, or in the exhaust system,
making a loud popping noise.
|
Preliminary Checks
| Refer to Important Preliminary Checks in
Symptoms - Engine Controls
.
|
Ignition System Checks
|
| • | Remove and inspect the spark plugs for the following conditions: |
| • | Test for correct ignition system operation. |
| • | Test for crossfire between spark plugs. Test for spark plug wire failure. |
|
Engine Mechanical Checks
|
| • | Inspect the engine for the following: |
| - | Correct engine cylinder compression |
| - | Sticking or leaking intake or exhaust valves |
| • | Inspect the intake and exhaust system for casting flash. |
|
Fuel System Checks
| Perform fuel system diagnosis. Refer to
Fuel System Diagnosis
.
|
Additional Checks
|
| • | Review service bulletins for LPG ECM PCM programming updates. |
| • | Verify that the correct LPG software and calibration has been programmed
into the LPG ECM. |
| • | Test for correct operation of the AFO Enable circuit. |
|
