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1990 Ford F-150 Custom 4.9L MIL Lamp on, O2 varies 0.8 -1.7
When driving vehicle down road at steady pace vehicle will start to loose power& start cutting out. O2 reading is always high and when you create vacum leak it goes even higher. Up to 1.8v!!! Has any Ford techs seen this before? We also have discovered someone...
FIX posted 9/5/2001
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Message Closed w/FIX
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Related Documents & Media | VIN | 1FTEF14Y3L |
| Engine | 4.9 L / 6 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / SEFI |
| Emissions | OBD1 |
| Symptoms | MIL Lamp on, O2 Varies 0.8 1.7 |
| Occurs | Always |
Trouble Codes
| 41 | EGO not switching |
Message Closed w/FIX
Vehicle Data
1990 Ford F-150 Custom
| VIN | 1FTEF14Y3L |
| Engine | 4.9 L / 6 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / SEFI |
| Emissions | OBD1 |
| Symptoms | MIL Lamp on, O2 Varies 0.8 1.7 |
| Occurs | Always |
Trouble Codes
| 41 | EGO not switching |
Video