1. We had some really hot muggy weather in the last few weeks and the car would stall at red lights, or pulling into parking spaces. It was not a quick stall, but more like a slow death RPM drop. If I turn the A/C off, I could sometimes keep her from stalling. Not always. The car never failed to start up immediately after stalling, and racing the engine seemed to solve the problem. This seldom happened below 90 degrees F.

2. Sometimes the car loses power for no reason. It's not a slow down, it is like the entire system has been grounded out, or like a misfire of a sparkplug. It only happens for a second, and then goes away. The car has never stalled from this event. When this happens, it is usually on acceleration, but sometimes will happen on the hiway. It is not as temperature dependent as the first problem seems to be, but it seems to occur more frequently in the hot weather.

Any takers?

As always, TIA.
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D.P. Mulvey in Central VA. 1991 744 NA, 150K Miles