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1991 Pontiac Grand Am, IC Circuit Waveform
EST didn't switch when Bypass went high. This was repaired with an ECM.
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| Engine | 2.5 L / 4 cyl / GAS |
| Trans | 3-speed AutomaticTransaxle |
| Delivery | Fuel Injection |
| Subsystem | ECM/Inputs/Outputs |
| Component | |
| Condition | Known Bad |
References
Vehicle Data
1991 Pontiac Grand Am LE 2.5L
| Engine | 2.5 L / 4 cyl / GAS |
| Trans | 3-speed AutomaticTransaxle |
| Delivery | Fuel Injection |
| Subsystem | ECM/Inputs/Outputs |
| Component | |
| Condition | Known Bad |
Video