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1990 Jeep Cherokee Limited 4.0L Excessive Emissions, Poor Idle Quality, Misfire
The issue I am experiencing is engine runs and idles but when throttle is opened at all can hear backfiring in exhaust system. On scantool the O2 is reading 4.98 volts all the time-even with O2 harness disconnected. Tried substituting known good ECM same probl...
FIX posted 8/25/2005
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Related Documents & Media | VIN | 1J4FJ78LXL |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / pfi |
| Emissions | fed |
| Symptoms | Excessive Emissions, Poor Idle Quality, Misfire |
| Occurs | Always |
Message Closed w/FIX
Vehicle Data
1990 Jeep Cherokee Limited
| VIN | 1J4FJ78LXL |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / pfi |
| Emissions | fed |
| Symptoms | Excessive Emissions, Poor Idle Quality, Misfire |
| Occurs | Always |
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