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GM Optispark Question
Since my DSO decided to go on vacation I cannot scope the Hi & Low res signals to the PCM. This car stalls when hot and the tach goes crazy at the same time. It's setting 16 & 32 codes for res pulse failures but it will also set 41 & 42 codes for Ignition cont... Login to read more. 
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| Engine | 5.7 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1994 Pontiac Firebird Trans Am 5.7L
| Engine | 5.7 L |
| Trans | 4-speed Automatic (Electronic) |
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