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Old 11-20-2009, 02:57 PM
 
Location: Wilkes-Barre,Pa
272 posts, read 943,172 times
Reputation: 132

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Quote:
Originally Posted by M3 Mitch View Post
OP, probably the main issue is your spark plug wires, particularly if they are original or otherwise really old. You can confirm this by starting the truck from cold at night and raising the hood - you will see "corona discharge" which is robbing your spark from the plugs, so to speak.

A quick temporary fix can be to just spray the wires good with WD-40.

Replacing spark plug wires is within the ability of any decent DIY type - go buy a good set of spiral type wires, maybe a boot puller, and some dielectric grease so the new wires won't stick to the sparkplugs - change one wire at a time.

If it's not the wires, my next suspect would be the distributor cap, again easy to DIY, again move the spark plug wires one at a time to the new cap. Work carefully and you won't have issues.

If the truck needs tuning, now would be the time for new spark plugs, cap & rotor anyway...better now than the dead of winter.
Thanks foe the info, i definately will try this.
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Old 11-20-2009, 04:00 PM
 
53 posts, read 491,612 times
Reputation: 56
i know how to fix it, move to California.
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Old 11-21-2009, 02:18 AM
 
Location: Earth
4,237 posts, read 23,226,492 times
Reputation: 2248
Sounds to me like when it rains the water is dripping past the hood into the cracks that separate the hood from the cowl panel and is possibly getting on either your distributor or your coil and is causing them to not work correctly.

Make sure the seal on the cowl panel is good and that it's not fallen off. This should help keep water out. Then look into the ignition system as to what's getting wet...the coil or the distributor.

My old S-10 used to have no starts to hesitant starts only if I washed it under hood and accidentally got the distributor and coil wet. Had to learn to be careful not to get that area wet.
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Old 11-21-2009, 02:26 AM
 
Location: SW Missouri
15,860 posts, read 33,135,593 times
Reputation: 22607
Quote:
Originally Posted by TransAm View Post
I have 2003 S-10 pick-up, every time it rains, the next day it wont start, I had the battery replaced, and the coil replaced, it rained last night, and no start in the morining, until it dried out. Any ideas?
I don't know if this vehicle has spark plug wires, but I used to have a 1976 Plymouth Fury that did the exact same thing until I got them replaced and then I didn't have the problem any more.

20yrsinBranson
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Old 11-21-2009, 01:57 PM
 
3,144 posts, read 8,032,633 times
Reputation: 895
Ill promise you its bad cap/rotor. Take it off and check for corrosion.
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Old 11-23-2009, 03:23 AM
 
Location: Greenville, SC
1,676 posts, read 3,056,422 times
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Quote:
Originally Posted by TransAm View Post
No, it starts when its cold, no start when its wet.
I'd have the crank sensor checked. This has to be a wiring or sensor issue.
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Old 11-23-2009, 04:22 AM
 
Location: Ohio
2,175 posts, read 8,732,246 times
Reputation: 3948
Pull the distributor cap. Look for green **** or white residue or burned distributor cap contacts and rotor cap contacts. Check for a hole burned throught the rotor cap center contact that constantly rides the coil contact wire point. (the center one)
Woudn't hurt to replace the wires if you don't know the last time they were changed.
I would almost bet the house that your problem is simply a bad distributor cap and or rotor cap.
When you change wires do one at a time so the firing order doesn't get out of whack.
I'm a retired mechanic and the first thing we look for when a gas engine wont run after a rain or going through a car wash (yes that happens) is what I've described. 99% of the time, that is the problem. It's a cheap fix.
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Old 11-23-2009, 04:19 PM
 
3,071 posts, read 8,486,267 times
Reputation: 1652
For sure it is a moisture issue, Checking for where the water comes in and sealing it off first and another old school trick used by school bus mechanics to get wet engines going fast is to spray down the wires and distributor and connections with "556" . This spray will displace the moisture unless the distributor is full of water.
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Old 11-23-2009, 08:07 PM
 
Location: SF Bay Area
5,996 posts, read 16,888,911 times
Reputation: 4064
Quote:
Originally Posted by Lindsey_Mcfarren View Post
Dude, thats strange but I got ya beat.

My rear view window wiper on my 2000 Expedition only turns on when its below freezing. Living in Florida we never get to use it. Only when we drive back to Texas during the winter.
How does a non functioning rear window wiper beat the fact that his car isn't starting? I can't be sure where your priorities are but I'd much rather be able to drive somewhere rather than use my rear wipers in my driveway.
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Old 11-24-2009, 10:11 PM
 
3,144 posts, read 8,032,633 times
Reputation: 895
This often seems to happen... never get that followup reply if everything works out.
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