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1999 Chevrolet C2500 Suburban 7.4L Misfire, MIL Lamp on
The misfire counter shows 1 miss on cyl 1, 2 misses on cyl4, then no miss at all. Rev a few times and get a miss on cyl 4. It is not consistently missing. I think the negative trim is from the slight occasional miss, allowing unburned fuel into the exhaust. Cl...
FIX posted 4/26/2016
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Message Closed w/FIX
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Related Documents & Media | VIN | 1GNGK26J7X |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire, MIL Lamp On |
| Occurs | Idle |
Trouble Codes
| P1133 | Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching |
Message Closed w/FIX
Vehicle Data
1999 Chevrolet C2500 Suburban
| VIN | 1GNGK26J7X |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Misfire, MIL Lamp On |
| Occurs | Idle |
Trouble Codes
| P1133 | Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching |
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