Well, as you already read, my car doesn't start after a heavy rain. It doesn't look like it is a problem with the cap, plug wires, starter, or battery because these all stay dry and the car still won't start. The car has power when the key is turned to On but when I try to start it the starter won't even click. I have this problem but usually try again 20 minutes after I'm late to school or work ( of course ) and it will start fine.

 

Check the wires down at the starter. They are probably loose and the water splashing up is cutting the connection. Loosen them, hit with a wire brush and retighten.

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87 TA, 305 TPI, Custom CAI, K&N, ACCEL 8mm wires,ACCEL Super-coil, ACCEL Plugs, JET TPI Airfoil, Cherry Bomb Muffler, 160* thermostat
The Phoenix Project..click to see my project car
Trans Am stuff and GIRLS, GIRLS, GIRLS!!!!!

 

could be that you have a small crack in your cap...and it dont have to be visable

 

Pull the cap after it rains. If there is moisture inside it.... My mom's old hyundai had a similar problem. Two of the hold down screws were broken, so whenever it rained it would run like **** until the cap dried out.

 

Check your seal is there/good underneath the bonnet
Mine was gone completely, should have suspected something with water on the air cleaner!

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Nobody ever got cancer from smoking tires!
gibsandwich@hotmail.com
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1982 Z28 Camaro
305ci LG4, Muncie 4-Speed, Holley Carburettor (CFM Unknown), 2.5" Stainless steel exhaust all the way through.
Fibreglass hood.
Boston 4x6" CX7e 2-ways, 6x9" Nippon America (no-name?) 3-ways
Other stuff I haven't figured out yet.