Question about Ford F-150

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My f150 runs perfect when dry. won't start if rains even when not moving

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Corrosion in spark plug wires and ignition coil wires, and such, can be sensitive to humidity

Posted on Jun 07, 2015

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Posted on Jan 02, 2017

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SOURCE: 1992 ford aerostar van wont start after it rains

I just had this exact problem. Wouldn't start or took 15 trys to start, but then ran smoothly. Sometimes a little rough starting on dry days, but pretty much hard starting after rain. I was thinking water in my tank/bad gas, but shooting some starter fluid in my intake didn't give me the initial blast at start up... that certainly indicated that it was electrical...
...but the next day the vehicle stalled in the middle lane of a three lane street, wouldn't restart. After pushing it to the curb, I got to the point where I was checking the wire from the coil to the distributor cap. Two thirds of the wire lifted right out. This wire was in 2 pieces! Amazing that it had been running at all, with this one wire burned down to a whisper, before it broke completely. There were signs of heat/elec damage to the wire also at a point an inch away on this wire.
Replacing the wires is absolutely the first thing to try. It's cheap and easy to do, and it should be done (or the wires inspected/tested) routinely anyway. The coil-to-distributor coil gets more engine heat and more use than any of the indiv spark plug wires and hence wears much faster.
I am betting this wire is much more likely your problem than a coil failure. Good Luck!

Posted on Mar 08, 2009

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SOURCE: 1997 Chevy Astro Van starting problems after rain

these vehicles get moisture in the distributor cap. replace those with GM ONLY parts. When you go to install the cap, put a bead of wheel bearing grease on the outside of the cap only where it seals to the distributor base. This will keep out the moisture which causes corrosion.

Posted on Jun 19, 2009

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SOURCE: when is raining and i

Change your distributor cap, rotor, and spark plug wires. This should be enough to prevent stalling in the rain.

When these components wear out, the problem is first noted when driving in the rain. If they are not changed, eventually the car will not start, even in good weather.

Posted on Jun 09, 2011

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SOURCE: 1999 Suburban 5.7L Misfires when it rains.

Did you change the plug wires?A good way to find an ignition problem is to take a spray bottle with water and spray your engine.This will show up bad wires or ignition arcing in the dark.Try spraying the coil also.Hope this helps.Good luck.

Posted on Dec 05, 2011

boscovsservi
  • 1 Answer

SOURCE: won't start after a heavy rain. Ok next day after drying out.

change the distributor cap by friend did the same thing and i wouldent start untill we took the distributor cap off and we seen croshin and we replaced it and it started up like a champ

Posted on Jul 17, 2012

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Left my window down in the rain and now it won't go up


It may have slid off the track from the water. If it doesn't start working once it dries out, a day or two depending on the weather, take the door panel off to make sure it is on the track properly and that the cables/wires have not corroded.

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Won't start after a heavy rain. Ok next day after drying out.


change the distributor cap by friend did the same thing and i wouldent start untill we took the distributor cap off and we seen croshin and we replaced it and it started up like a champ

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1999 Suburban 5.7L Misfires when it rains.


Did you change the plug wires?A good way to find an ignition problem is to take a spray bottle with water and spray your engine.This will show up bad wires or ignition arcing in the dark.Try spraying the coil also.Hope this helps.Good luck.

Dec 05, 2011 | 1999 GMC Suburban

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Everytime it rains real hard. car won't start, after 2 days it then starts.. Everything works good..........Then a month later when it rains again, the car won't start for another 2...


Obviously water is the cause. Make sure all hood seals and underbody splash shields are in place, check firewall main connector for security. After it rains (without driving it in rain) check floor mats inside for water. A possible windshield or dash leak is allowing water into electrical area near instrument cluster (windshield may need resealed). Lift hood and look for water on any electrical connections disconnect dry, and seal with tune up grease from parts store.
Good luck

Aug 24, 2011 | BMW 330 Cars & Trucks

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When is raining and i drive it on to the water it stops and dont start. even if starts it the engine doesnt run properly..the next day ..no rain ..the engine work perfectly..


Change your distributor cap, rotor, and spark plug wires. This should be enough to prevent stalling in the rain.

When these components wear out, the problem is first noted when driving in the rain. If they are not changed, eventually the car will not start, even in good weather.

Jun 09, 2011 | 1991 Toyota Previa

1 Answer

Car runs bad after it gets "wet"


spray the electrics with wd40/silicon,cheapest way to
start fixing the wet problem(if after spraying problem persists then its gonna cost.....)

Jun 30, 2010 | 2005 Chevrolet Cobalt

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