1994 Ford F150 engine mis fire

1994 FORD F-150
100,000 MILES • 6 CYL • 4WD • MANUAL
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JAGEDWARD
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I have an F150 that misfires in wet or even in humid weather. It's so bad skipping the car check engine light comes on and the truck won't move without bucking and eventually stalling. Of course I have already replaced all of the usual stuff like wires, plugs, distributor cap and rotor, air filter. I've checked the coil connections and that seems ok.

It runs pretty decent in dry conditions but I still detect a little loss of power and skipping on occaission.
Jul 15, 2010 at 7:40 PM
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RASMATAZ
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Check engine light coming On

Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis, finding out what's going on
Jul 15, 2010 at 7:48 PM
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JAGEDWARD
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There are no engine fault codes. Light shuts off after it runs a while and dries out. Like I said it runs pretty good in low humidiity days.
Jul 15, 2010 at 9:02 PM
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MIKESHELDON
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Sounds like a head gasket. but let me know what motor and I can give you an idea of how expensive.
water in cylinder, only other thing it could be from is an intake gasket leaking. alot of gm v6 motors are notourious for the intakes and then it get sucked into the cylinder. Look along where the intake meets the head see if theres any antifreeze or antifeeze crust. The crust is a sign of slow seepage and builds up there.
so what motor and which plug!
Jul 16, 2010 at 5:26 AM
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RASMATAZ
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. alot of gm v6 motors are notourious for the intakes and then it get sucked into the cylinder. Were dealing with a ford product here and am still waiting for codes if any available
Jul 16, 2010 at 7:18 AM
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