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Truck will not start with too much moisture in the air?

Tiny
RTPEABODY
  • MEMBER
  • 1998 CHEVROLET SILVERADO
  • 175,000 MILES
Problem is getting worse. Seems like it wouldn't start very well (idled rough for a few seconds)if there was a lot of moisture or if it rained over night. Now it won't start at all in the morning if we have any moisture/rain. Starts in afternoon fine. Seems to be only after long sits (overnight). I have less than 2 years on fuel pump/filter, plugs and wires, distributor cap and rotor. I have tried taking cap off and drying out, and even put plastic over cap incase it was getting wet from rain. Problem is getting worse.
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Monday, March 5th, 2012 AT 6:25 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

This is a moisture issue is usually happens when moisture gets into the distributor or the coil pack.
If the moisture going into the coil pack then you will have to replace it.
You should be able to clean out the distributor and put the cap back on with new o-ring.

Be sure to inspect the ignition control module as well.

https://www.2carpros.com/articles
https://www.youtube.com/c/2carpros/featured

I have attached few diagrams for your reference.

Please let me know of any questions.

Thank you.
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Sunday, August 8th, 2021 AT 8:03 PM

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