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This was exactly what was happenning to my 1989 Ford Bronco 351W engine. After it warmed up, it worked OK. It turned out to be a stuck/rusty EGR valve. I had replaced a few inexpensive parts until I realized what it was. I simply removed it from the block and sprayed the inside with wd40 and attempted to carefully work it back and forth. This fixed it up and its been working fine for a year now. In an extreme case, you might have to get a new one.

You can buy a spray from any local department store that has an autmotive section. The spray is for wet spark plugs and when you dowse them and your distributor cap it clears the water off.

If you try this and the car fires up on those wet days and eminates your problem then you know it results from damp spark plugs and distributor.

If you have never replaced a new set with wires and cap - do it and reap the rewards.

Likely a spark problem. Might be a cracked distributor cap, or faulty wires. Moisture makes insulators more conductive, and reduces the spark that can be generated, therefore no spark in the cylinder

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โˆ™ 2015-07-16 19:22:40
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Q: If your car sputters and even stops running in the morning sometimes especially if it has been wet outside what could be the cause of this?
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