Posted by George Marsh on November 18, 2013 at 12:34:18 from (205.188.116.10):
In Reply to: Re: 4.3L GMC posted by JMOR on November 18, 2013 at 09:18:00:
Jessie, thanks a lot.
It's weird, they mention removing vent screens and make sure there is ventilation. So if there is ventilation, won't on humid days, moisture get in and cause a problem? Which seems to be what's happening to me.
So, is adding grease to the cap a good or bad idea?
I'm still leaning towards my problem being more of a design issue for Indiana weather, which one day can be winter like, the next day 65, rainy, condensation of garage floor, and I have ingition problems.
Two weeks ago the above conditions happened. Truck wouldn't run worth a darn. I parked it very close to my electric baseboard heater in garage. Opened hood, turned heater on, opened windows just a little to vent moisture out of garage. Next day, problem was gone. This lasted for a few weeks until we had the bad storm yesterday, humid conditions, condensation, truck has same problem again. Almost didn't get it started this morning. Computer code showed it had random missfire. After it ran for about 10 minutes, check engine light went out, problem went away.
I'm 100% convenced my problem is moisture especially with rust on the rotor screws. So how do I vent and at the same time get rid of the moisture? Real catch 22. What makes people think that moisture won't cause the delco to fail? Mine did. George
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