GM 5.3L V8
5.3L misfire diagnosis
Ignition, injector, lifter and mechanical misfires on the 5.3L.
Why this matters on the GM 5.3L V8
A 5.3L misfire can be a coil or plug, an injector, a lifter or a valve problem. Order of testing matters.
Symptoms owners notice
- Flashing check engine light
- Rough idle
- Loss of power
What we check
- Misfire counters
- Coil and plug swap tests
- Injector balance
- Compression
Repair work involved
- Ignition or injector repair
- Valvetrain repair when mechanical