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2003 Chevrolet S10 4.3L Poor Idle Quality
Hi, need some new ideas or insights. This engine idles rough. Has a definite stumble. I've done the testing below as well as isolating the fan clutch/accessories, testing AC voltage, cleaned IAC and t-body, and pressure drop tested all injectors (good; 16 ...
Summary posted 9/21/2019
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Related Documents & Media | VIN | 1GCCS19X73 |
| Engine | 4.3 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / Poppet |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality |
| Occurs | Always |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
Message Closed w/Summary
Vehicle Data
2003 Chevrolet S10
| VIN | 1GCCS19X73 |
| Engine | 4.3 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / Poppet |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality |
| Occurs | Always |
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) |
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