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Well, actually where I was going was this:
1) Plugs get fouled due to some subtle problem like short-circuiting wires, worn cap/rotor, plugged air filter, etc. which causes the engine to run rich, but not bad enough to be noticable under normal circumstances. The car runs OK when the weather is warm.
2) The ambient temp drops below freezing. The water vapor remaining in the head after the engine was last run condenses on the carbon on the plugs and then freezes. The dirtier the plugs, the more likely this will happen.
3) When you go to start the car in the morning, the plugs are crusted with wet/frozen carbon, and they don't spark well (if at all). The absence of a spark means the plugs get soaked in gasoline, which doesn't really improve the situation.
4) Depending on how bad this is, it may just mean that the car will run poorly for a minute or two until the engine heats up enough to burn off the wet carbon on the plugs. If it's really bad the car will konk out right away.
I'm not saying this is your problem, but it's really easy to check, and the solution is to put in a set of new plugs. With new plugs, the car will run better (for a few days or so) until the plugs get fouled again. That is, unless you solve the problem that's causing the poor mixture in the first place (see # 1).
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'92 245 5-speed, '92 944 GL auto
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