87 F150 won't start when raining

jra · 02-13-2008, 10:16 AM

I have a 87 F150 with a 302 V8. When we have damp rainy weather it won't start. I thought it could be moisture in the distributor, but I took the cap off and it was dry. When it won't start I just let it sit until it quits raining and drys out, then it will start and run fine. Any ideals as to what my problem could be? Coil, bad wiring plug somewhere? Has anyone else this problem with their Ford?

junior3382 · 02-13-2008, 03:08 PM

Ok bud here you go. When you open the hood, look on the fender walls. If I remember correctly, it will be on the drivers side wheel well. There is a little relay box. In there should be a plug. That is a rely for the ignition. It is a bad location due to weather, and it should have a seal. But they wear. Check that relay. If it gets wet or is a little loose, when the coonection is made to send the power to the starter, it will fail. It is an easy fix, either wipe it off and or tighten the connections. You should be fine.

jra · 02-15-2008, 08:16 AM

Thanks for the Info Junior, I see the little box you are talking about, I'll clean the connections up and see if that solves my problem.

keithr0005005 · 02-15-2008, 12:30 PM

if the relay wasnt the problem check your ignition wires....i had the same problem with my chevy and it was just bad wires.

pyaaw! · 02-23-2008, 08:14 PM

another problem could be condensation getting in the plug wires, try putting dielectric grease in both ends of the plug wires.

02-13-2008, 10:16 AM	#1
jra Full Member Join Date: Dec 2006 Posts: 10	87 F150 won't start when raining I have a 87 F150 with a 302 V8. When we have damp rainy weather it won't start. I thought it could be moisture in the distributor, but I took the cap off and it was dry. When it won't start I just let it sit until it quits raining and drys out, then it will start and run fine. Any ideals as to what my problem could be? Coil, bad wiring plug somewhere? Has anyone else this problem with their Ford?

02-13-2008, 03:08 PM	#2
junior3382 Senior Member Join Date: Mar 2007 Location: Currently, I live in Lancaster county, Pennsylvania. Posts: 3,170	Ok bud here you go. When you open the hood, look on the fender walls. If I remember correctly, it will be on the drivers side wheel well. There is a little relay box. In there should be a plug. That is a rely for the ignition. It is a bad location due to weather, and it should have a seal. But they wear. Check that relay. If it gets wet or is a little loose, when the coonection is made to send the power to the starter, it will fail. It is an easy fix, either wipe it off and or tighten the connections. You should be fine. __________________ *The Blazer is dead, so I pumped her with lead, laid her to bed, and bought a FORD instead!*

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02-15-2008, 08:16 AM	#3
jra Full Member Join Date: Dec 2006 Posts: 10	Thanks for the Info Junior, I see the little box you are talking about, I'll clean the connections up and see if that solves my problem.

02-15-2008, 12:30 PM	#4
keithr0005005 Senior Member Join Date: Jan 2008 Posts: 156	if the relay wasnt the problem check your ignition wires....i had the same problem with my chevy and it was just bad wires.

02-23-2008, 08:14 PM	#5
pyaaw! Junior Member Join Date: Feb 2008 Posts: 1	another problem could be condensation getting in the plug wires, try putting dielectric grease in both ends of the plug wires.