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1991 Ford F-350 Custom 7.5L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, black smoke
Icked fuel press reg, good no leaks, pressure at specs and holds for at least 1 min. cked and replaced o2 sensor, ck vac at map ok replace w/known good one no [...] inj for sticking and power contrub ok. ohm ck all circuts to pcm and ck for leakage to gnd ...
FIX posted 11/28/1999
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Related Documents & Media 
| VIN | 2FTJW36G1M |
| Engine | 7.5 L / 8 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / efi |
| Emissions | U.S.EPA |
| Symptoms | Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, Black Smoke |
| Occurs | Always |
Trouble Codes
| 42 | KOER runs rich |
Message Closed w/FIX
Vehicle Data
1991 Ford F-350 Custom
| VIN | 2FTJW36G1M |
| Engine | 7.5 L / 8 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / efi |
| Emissions | U.S.EPA |
| Symptoms | Excessive Emissions, Poor Idle Quality, Poor Fuel Economy, Black Smoke |
| Occurs | Always |
Trouble Codes
| 42 | KOER runs rich |
Video