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1991 Ford Ranger Custom 4.0L Spark Knock
Hello all I need help from some Ford Tecs. on this one. This truck has a severe spark knock (pre-ignition) only after driving for at least 30 min. It seems to occur mostly during dry weather,says the owner, and only during accleleration. Not during cruiz or de...
FIX posted 7/30/2000
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| VIN | 1FTCR15XXM |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / EFI |
| Emissions | Federal |
| Symptoms | Spark Knock |
| Occurs | Hot, Under Load, on Accel |
Message Closed w/FIX
Vehicle Data
1991 Ford Ranger Custom
| VIN | 1FTCR15XXM |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / EFI |
| Emissions | Federal |
| Symptoms | Spark Knock |
| Occurs | Hot, Under Load, on Accel |
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