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1990 Ford F-250 Custom 7.5L MIL Lamp on, Pings under load
I need some help on why this vehicle would set a simultaneous Code 334 and 327 (EVP voltage both too low and too high). I have monitored the EVP and under normal conditions is varies from .53 (valve closed) to 4.48 (valve wide open). I have monitored computer ...
FIX posted 7/10/2000
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| VIN | 1FTHX25G9L |
| Engine | 7.5 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / EFI |
| Symptoms | MIL Lamp on, Pings Under Load |
| Occurs | Intermittently |
| Misc. | California Emissions |
Trouble Codes
| 172 | System always lean |
| 327 | EVP voltage below .19 |
| 334 | EVP voltage high |
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Vehicle Data
1990 Ford F-250 Custom
| VIN | 1FTHX25G9L |
| Engine | 7.5 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / EFI |
| Symptoms | MIL Lamp on, Pings Under Load |
| Occurs | Intermittently |
| Misc. | California Emissions |
Trouble Codes
| 172 | System always lean |
| 327 | EVP voltage below .19 |
| 334 | EVP voltage high |
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