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1991 Ford Explorer XL 4.0L Pinging
Truck belongs to one of my [...] it hits operating temp. will ping all the time,even at asteady [...] worse on accel. or pulling up an incline. noticed no. 4 plug had aslight green [...]?Otherwise the truck performs well.
FIX posted 11/11/1999
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| VIN | 1FMDU34X4M |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / efi |
| Emissions | Fed. |
| Symptoms | Pinging |
| Occurs | Always, Hot |
Message Closed w/FIX
Vehicle Data
1991 Ford Explorer XL
| VIN | 1FMDU34X4M |
| Engine | 4.0 L / 6 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / efi |
| Emissions | Fed. |
| Symptoms | Pinging |
| Occurs | Always, Hot |
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