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1998 Pontiac Firebird Trans Am 5.7L tach.
Tach does not operate. Mitchell test procedure calls for a special tester. Is there any way to check this without it? Does the pcm send a frequency or a voltage change to the tach to operate? If anyone knows how the pcm calculates engine speed please let me kn...
FIX posted 10/12/2000
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| VIN | 2G2FV32G1W |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Affected | Tach. |
| Conditions | Inop |
Message Closed w/FIX
Vehicle Data
1998 Pontiac Firebird Trans Am
| VIN | 2G2FV32G1W |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Affected | Tach. |
| Conditions | Inop |
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