[Mmusicman]

Yes. It runs fine til it doesn't. Every time it is corrosion under the cap.

So the question would seem to be, what is causing corrosion under your cap, that isn't with mine.
Did you consider my reply above?
Maybe a stretch, but no other answers seem to resolve this issue.

 

[ADDvanced]

Well, you live in an arid climate if I remember right. Wisco is pretty humid/wet a lot of the time.

 

[Mmusicman]

Wisco is pretty humid/wet a lot of the time.

I wonder why "Wisco humid/wet" didn't affect you last year, or all the previous years?
Only now.. or has this always been an issue for you?

 

[WoodButcher]

I wonder why "Wisco humid/wet" didn't affect you last year, or all the previous years?
Only now.. or has this always been an issue for you?

I never considered the CPS but I did hog out the dizzy hold down, my timing was dead nuts just no spark.
CT can be humid at times but I've found that parking on blacktop or cement always made a difference.
I've gone as far as raising a gravel parking area to avoid parking any of my vehicles on a wet area.

At a place I rented in 2012 I spread 3 tri-axles of processed recycled asphalt to bring the driveway up and did this a year later for a floor of a shelter for my '93 swap-

DSCF2844

• WoodButcher
• May 18, 2013

PT and torch-down rubber

then took the shelter and floor out when I moved-

image2

• WoodButcher
• Jul 17, 2017

 

[ADDvanced]

I wonder why "Wisco humid/wet" didn't affect you last year, or all the previous years?
Only now.. or has this always been an issue for you?

I've gone through 3 caps and rotors in under 20k miles, so I'd say it's been a persistent issue. I'm hoping the new dizzie solves it, but nothing about the new one would reduce moisture build up in there. I'm hoping the dialectirc grease on the edge of the cap where it mates to the distributor helps keep it out.

 

[gwd]

The problem might be somewhere else.
Have you changed the spark plug wires?
Change the coil. Might have cracks in it that you do not see.
Replace the Crank Shaft sensor. It is not expensive.
Clean the MAF sensor in the intake hose/pipe after air filter or get another one and see if that helps.

How long do you run the engine.
If for a very short time and the engine does not reach full temp,
Few miles would be good.
The temp gauge should show that the thermostat has opened and closed a couple of times to be sure it got hot enough there.
That might keep the motor from drying the distributor area properly.