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1997 GMC C1500 Sierra SL 5.0L Excessive Emissions, Poor Fuel Economy, MIL Lamp on
We have reset ecm block learn and it instanly starts counting down to -18%.per gm bullitan we cleaned injectors. Flow tested with Mastertech for pressure drop(all within 1.5lbs). Ran cylinder balance with tester all pasted no [...] fuel pressure for 1 hr minum...
Summary posted 9/8/2002
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Related Documents & Media | VIN | 2GTEC19M8V |
| Engine | 5.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / cpi |
| Emissions | OBD-II Compliant |
| Symptoms | Excessive Emissions, Poor Fuel Economy, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| 172 | bank1 upstream o2 rich |
| 175 | bank 2 upstream o2 rich |
| 300 | random missfire |
Message Closed w/Summary
Vehicle Data
1997 GMC C1500 Sierra SL
| VIN | 2GTEC19M8V |
| Engine | 5.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / cpi |
| Emissions | OBD-II Compliant |
| Symptoms | Excessive Emissions, Poor Fuel Economy, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| 172 | bank1 upstream o2 rich |
| 175 | bank 2 upstream o2 rich |
| 300 | random missfire |
Video