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2004 Chevrolet Trailblazer LS 4.2L Surge
this vehicle has a slight surge at all times except at idle. the surge is about 50 rpms. it has a bad catalyst convertor. the rear 02 is switching with the front one. the surge seems to follow fuel trim & o2 sensor numbers. i unpluged rear 02 sensor & symptom ...
FIX posted 8/17/2012
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Message Closed w/FIX
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Related Documents & Media | VIN | 1GNDS13S74 |
| Engine | 4.2 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Surge |
| Occurs | Always |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/FIX
Vehicle Data
2004 Chevrolet Trailblazer LS
| VIN | 1GNDS13S74 |
| Engine | 4.2 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Surge |
| Occurs | Always |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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