Common Checks
- Inspect cylinder 8 ignition parts, injector wiring, and plug condition.
- Swap the suspect coil or plug to confirm whether the misfire follows.
- Check compression or leakdown if ignition and fuel checks pass.
Diagnostic trouble code
P0308 Cylinder 8 Misfire Detected
The PCM detects a misfire on cylinder 8.
Misfire CodesCommon Repairs
- Replace the failed plug, coil, boot, wire, or injector after confirmation.
- Repair wiring or mechanical faults when testing points there.
Mustang Notes
- Cylinder 8 is V8-only; six-cylinder and four-cylinder Mustangs should not list it as an applicable cylinder fault.
Model-Year Applicability
Listed for 1996 and newer traditional gasoline Mustang pages in this first-pass catalog. Engine, calibration, and Ford-specific codes may narrow that range as more service data is added.