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Answered 2007-01-09 09:32:28

Change the coolant temperature sensor. Trust me, I own an Express and had problems starting when it was cool and humid. A $10 part, located in the thermostat housing on the top front half of the engine. Very easy to fix, but a huge pain in the backside problem to diagnose. You can thank me later because I know how frustrating this problem is.

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