Reprogram PCM if vehicle hesitates after being parked for twenty minutes on Mercury Cougar

If the vehicle hesitates or idles roughly after being parked for twenty to thirty minutes, with the engine still warmed to normal operating temperature, you may need to reprogram the PCM (powertrain control module) with new calibration.


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Average mileage: (–)
Exhaust & Emissions affected: 2.0L 4 Cylinder
2 model years affected: 1999, 2000
2 people reported this problem
0 people shared problem details
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