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1993 Chevrolet Astro 4.3L Excessive Emissions, HIGH NOX
Vehicle fails PA asm 50/15 emissions test for high NOX. Scan data all OK. Replaced EGR valve & solenoid, Checked & cleaned EGR passage. Replaced O2 sensor as well. Timing is right on at O deg. Uses a negative back pressure EGR valve that bleeds off vacuum ...
FIX posted 12/22/1999
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| VIN | 1GBDM19Z4P |
| Engine | 4.3 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / TBI |
| Emissions | FED/EGR/O2/CAT/NO AIRPUMP |
| Symptoms | Excessive Emissions, High NOx |
| Occurs | Asm 50/15 Test |
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Vehicle Data
1993 Chevrolet Astro
| VIN | 1GBDM19Z4P |
| Engine | 4.3 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / TBI |
| Emissions | FED/EGR/O2/CAT/NO AIRPUMP |
| Symptoms | Excessive Emissions, High NOx |
| Occurs | Asm 50/15 Test |
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