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2002 Jeep Grand Cherokee Limited, ECM/Inputs/Outputs waveform
This was after a valve job. Timing chain was off 1 tooth. Most noticable symptom was fuse for ign primary blowing. This was caused by PCM being confused by incorrect syn of ckp/cmp and turning on multiple coils at same time.
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| VIN | 1J4GW48N42 |
| Engine | 4.7 L / 8 cyl / GAS |
| Trans | 4-speed AutomaticTransmission (Electronic) |
| Delivery | Fuel Injection |
| Subsystem | ECM/Inputs/Outputs |
| Component | , |
| Condition | Known Bad |
Vehicle Data
2002 Jeep Grand Cherokee Limited 4.7L
| VIN | 1J4GW48N42 |
| Engine | 4.7 L / 8 cyl / GAS |
| Trans | 4-speed AutomaticTransmission (Electronic) |
| Delivery | Fuel Injection |
| Subsystem | ECM/Inputs/Outputs |
| Component | , |
| Condition | Known Bad |
Video