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1996 Chevrolet Express 2500 5.0L Poor Idle Quality
Customer brought vehicle in for High idle condition/rough idle. Road test vehicle - no miss /high idle/runs rough at idle(roughness worse when cold) - High idle all the time. Checked fuel & ignition -ok. Check for vacuum leaks(EGR) Replaced EGR valve & IAC con...
FIX posted 3/8/2001
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Related Documents & Media 
| VIN | 1GFG25M4T1 |
| Engine | 5.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / TBI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality |
| Occurs | Always |
Trouble Codes
| P0122 | Throttle Position Sensor Circuit Low Voltage |
| P0135 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction |
| P0154 | Air Fuel Sensor (Bank 2 Sensor 1) Heater Circuit Malfunction |
| P0300 | Multiple Misfire Detected |
| P0501 | Vehicle Speed Sensor Circuit Low Input |
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Vehicle Data
1996 Chevrolet Express 2500
| VIN | 1GFG25M4T1 |
| Engine | 5.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / TBI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality |
| Occurs | Always |
Trouble Codes
| P0122 | Throttle Position Sensor Circuit Low Voltage |
| P0135 | Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction |
| P0154 | Air Fuel Sensor (Bank 2 Sensor 1) Heater Circuit Malfunction |
| P0300 | Multiple Misfire Detected |
| P0501 | Vehicle Speed Sensor Circuit Low Input |
Video