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1988 Ford F-150 Custom 4.9L MIL Lamp on, tachometer
Check engine light flashes between 1500rpm to 2500rpm when raising engine speed in neutral and when shifting while [...] notice intermitent tach operation(no tach input on dash).Performed KOEO,KOER,Cont,wiggle test,output state,twisted and pull all wiring ...
FIX posted 2/9/1999
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| VIN | 1FTDF15Y1J |
| Engine | 4.9 L / 6 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / efi |
| Emissions | ca |
| Symptoms | MIL Lamp on, Tachometer |
| Occurs | Always |
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Vehicle Data
1988 Ford F-150 Custom
| VIN | 1FTDF15Y1J |
| Engine | 4.9 L / 6 cyl / GAS |
| Trans | 5-speed Standard |
| Delivery | FI / efi |
| Emissions | ca |
| Symptoms | MIL Lamp on, Tachometer |
| Occurs | Always |
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