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2003 GMC Sonoma SLS 4.3L Poor Idle Quality, Misfire
truck came in for emissions readiness test not complete cat and evap won't set. car has a slightly rough idle and under load mil flashes dtd po303. new plugs were put in and another garage had told them the cats where blocked.. we put on two new cats. same res...
FIX posted 5/5/2011
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Message Closed w/FIX
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14 Replies Received
14 Replies Received
Related Documents & Media | VIN | 1GTDT19X43 |
| Engine | 4.3 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire |
| Occurs | Under Load |
Trouble Codes
| P0303 | Cylinder 3 Misfire Detected |
Message Closed w/FIX
Vehicle Data
2003 GMC Sonoma SLS
| VIN | 1GTDT19X43 |
| Engine | 4.3 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire |
| Occurs | Under Load |
Trouble Codes
| P0303 | Cylinder 3 Misfire Detected |
Video