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1999 Chevrolet Silverado 1500 4.3L Poor Idle Quality, Misfire
Hi Kids This Truck Has Steady Misfire Spark is Good. Tried New Plug no Help. Hear is What I Want Help With. I Went to Check Exhaust Back Pressure. Removed EGR Valve So I Could Test Pressure at EGR Exhaust Port. Whith the Engine Running The Pressure Bounces up ...
Summary posted 8/15/2015
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17 Replies Received
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Related Documents & Media | VIN | 1GCEC14W0X |
| 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 | Always |
Trouble Codes
| P0304 | Cylinder 4 Misfire Detected |
| P0305 | Cylinder 5 Misfire Detected |
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/Summary
Vehicle Data
1999 Chevrolet Silverado 1500
| VIN | 1GCEC14W0X |
| 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 | Always |
Trouble Codes
| P0304 | Cylinder 4 Misfire Detected |
| P0305 | Cylinder 5 Misfire Detected |
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Video