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Hi i'm new to the forum,been reading all morning some great stuff in here.i have a 94 ranger with a 4.0 and a five speed 95 thousand mile on her.in the last year or so the truck does not start when left out in the rain,so i pull it in the garage and 20 minutes later she fire right up.the truck cranks over ok but just will not start.i have used dielectric grease on plugs and coil,and it does not help.does anyone have any ideas.
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something is shorting out when humidity gets up there around 100%. I would check everything assoc. with the ignition and start changing things out. One thing you could try is when it does that and if it's dark out open the hood and have someone crank the engine you might just see where the short is happening, if you are lucky. I'm not sure but if that year still has a distributor the cap and wires are a good place to start then the coil then the EEC module if it's distibutorless then it will be a little tougher to figure out without spending some bucks...good luck,,,Neil
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From: Southern MD
Originally Posted by slicks94
Hi i'm new to the forum,been reading all morning some great stuff in here.i have a 94 ranger with a 4.0 and a five speed 95 thousand mile on her.in the last year or so the truck does not start when left out in the rain,so i pull it in the garage and 20 minutes later she fire right up.the truck cranks over ok but just will not start.i have used dielectric grease on plugs and coil,and it does not help.does anyone have any ideas.
What a pain this can be.
A few things to check:
As cobra351 said, I am not sure if the '94 had a distributor or some other ignition. With that in mind, IF it has a distributor, you should look for -
1. Hairline fractures on the distributor cap. (Have someone crank the engine over [at night/total darkness] and observe the cap. IF there are hairline fractures, you will see the current 'dancing' all around the cap, from tower to tower, maybe even down the sides to ground.)
Remedy: Replace distributor cap.
2. Bad or cracked ignition (spark plug) wires. Same test as #1, above.
Remedy: Replace spark plug wires.
3. Cracked coil. Same test as #1, above.
Remedy: Replace coil.
The above listed possiblilites are just the tip of the iceberg. The humidity problem is what is the 'kicker'. An old trick was to spray the components with hair spray. This will 'kinda waterproof' the components. (This doesn't last long.)
If you have already ruled out these possibilities, kindly disregard the post.
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