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2003 GMC Yukon Denali 6.0L Poor Idle Quality, Misfire, MIL Lamp on
hi posting for my brother in law been getting code po300 missfire so we relaced wires and plugs maf meter and air filter truck will still set code at times and idles at 550rpm graphed o2 sensor all ok preformed ckp varation,sprayed for intake leak did not show...
FIX posted 8/13/2013
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18 Replies Received
18 Replies Received
Related Documents & Media | VIN | [No VIN Available] |
| Engine | 6.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On |
| Occurs | Idle |
Trouble Codes
| P0300 | Multiple Misfire Detected |
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Vehicle Data
2003 GMC Yukon Denali
| VIN | [No VIN Available] |
| Engine | 6.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire, MIL Lamp On |
| Occurs | Idle |
Trouble Codes
| P0300 | Multiple Misfire Detected |
Video