It will chug and chug but not actually start

1996 GEO METRO
152,000 MILES • 4 CYL • FWD • AUTOMATIC
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DOUGSTOTT
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If my car has been setting for a while during rain or high humidity my car will not catch. It will chug and chug but not actually start. A few hours or so later, after the rain has subsided the car will start. It's gotten to the point where I almost have to check the weather forecast before parting so I won't get stranded. Thx.
Jan 2, 2008 at 6:52 AM
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SQM
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Hello,

It sounds like moisture is going into the distributor cap. Probably due to a bad seal or a crack.
This is preventing the engine from getting spark and not starting.
As it dries up the spark is produced, and engine starts.

Inspect the distributor cap, there is a good chance of having corrosion inside the cap due to moisture.
Any time the cap gets replaced; it is recommended to replace the rotor as well.

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.
Oct 28, 2021 at 12:24 PM