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I have an 83 Z28 thst in the past few years has had a big problem with starting when the engine gets wet or has moisture on it. Sometimes it will start and sounds fine, but will let me sit a few miles down the road. After it dries out it will work fine until the next time. We replaced the distributor cap, but that didn't make a difference. Any suggestions???

Thanks,
Deva---83 Z28
 

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Deva,
You probably need to go through and replace all the ignition high voltage components. Plug wires, cap and rotor, probably plugs also. Use a good set of GM wires and make sure to use the silicon "grease" they give you with the wires. If you want to really see what is happening, wait until after dark, open the hood and spray a light mist of water from the hose on everything, then get someone to start the car while you watch. You will see the "light show" wherever the wires are arcing etc.
Have fun,
 
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