Bronco II dies
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New User
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Bronco II dies
Saturday I drove my sons Bronco II to work in a hard rain.At my jobs parking lot I ran through a puddle of water and about 100 feet later the truck shut off and refused to start.I walk to the office to get a tow and then back to the truck (took maybe 2 to 3 minutes) tried to start it and it started right up without any problems so I parked it and went on to work.Came out that morning it started fine and I drove home with out a problem.Sat all day Sunday then I drive to work Monday with no problem,so I drive it to work Tuesday in a deep (8") snow and about 2 miles from home it does the same thing...dies then after about 3 minutes it started up and ran fine the rest of the way to work then home again in the morning.My question is is there a relay that would cause this or should I be looking at maybe a wet coil? Any ideas? thanks for your time
Junior User
Joined: Jun 2007
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I don't know about a relay but something is getting wet. You might look at the computer, located under the passenger side kickpanel. You could have a leak letting water get in there. Also all the wiring and assorted connectors located on the drivers side fenderwell are subject to getting wet. The inertia switch that that shuts the fuel pump off in case of an accident is located under the top of the passenger side carpet it can get wet too if there's a leak but i wouldn't think it woud cause your problem. just keep checking for electrical connectors that look corroded or damaged. Good Luck
Rub my Belly
Joined: Jan 2004
Posts: 3,093
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From: Lawrence, KS
Does it just shut off completely or sputter and shut off. How does it start after that happens? Like there was nothing wrong or sputter and then start?
If it kinda sputters and dies, It might be a cracked distributor cap.
Coil wire might be loose or going bad. Might check it with an OHM meter.
Or you could pop the hood at night and see if the are any sparks coming from the coil wire or plug wires. If not, you might mist the engine down with water and see if there is any sparks.
If it kinda sputters and dies, It might be a cracked distributor cap.
Coil wire might be loose or going bad. Might check it with an OHM meter.
Or you could pop the hood at night and see if the are any sparks coming from the coil wire or plug wires. If not, you might mist the engine down with water and see if there is any sparks.
Rub my Belly
Joined: Jan 2004
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From: Lawrence, KS
I forgot, Check all the electrical connectors to make sure they are tight. Also there should be a small black wire connected to the battery and running into the wire loom. sometimes it has a connector that looks kinda like a fuse holder. Iv'e seen that wire go bad. It'll crank but not start if that isn't connected properly.
Jiggle some of the wires around while it's running (Not the plug or coil wires) to see if it dies.
Never fails. Kid lets dad borrow truck and dad screws it up. But i guess parents have to learn somehow.
Jiggle some of the wires around while it's running (Not the plug or coil wires) to see if it dies.
Never fails. Kid lets dad borrow truck and dad screws it up. But i guess parents have to learn somehow.
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No sputter or miss just shuts off and then 2 0r 3 minutes later starts like nothing happened...all new plug wires,distibuter cap,rotor button etc.I checked the coil for loose corroded wires and found nothing bad,drove it to work last night (cold but no snow or rain) and had no problem to work or back.I did find two small holes in the inner fender in front of the coil (looks like some thing should mount there) that I think might be letting water from the rain/snow spash onto the coil conection.Guess I`ll plug those and see what gives, again thanks for your time.
Freshman User
Joined: Oct 2005
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Pull off the steering wheel shroud and check the ignition switch(not the cylinder lock, the actual switch). They wear and become separated but usually work in dry weather and on and off in humid weather. I have replaced one on my 84 and one on my 85. A good way to check is to remove the shroud and whenever it doesn't start, push the switch in and hold it then try to start it.
Elder User
Joined: Feb 2004
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From: Ocean Park WA
I had a similar problem with my old F-350 and it was the mag pick up in the distributor. I pulled my hair out trying to fix it and even had it at the dealer when He said he couldn't find anything I had him leave it running and close the hood while I went to pay for the other work and Guess what, there it was. My old bronc did it but what it turned out to be there was the pump in the tank had a broken power lead fixed it and no more trouble. 2 othe r poosibilities.
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Elder User
Joined: Jul 2003
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From: north carolina
i would guess the pickup in the dizzy and the tfi unit on the side of the dizzy they go out with out warning and can cause intermediate stalling of the engine.
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Well I think I found the problem...seems there were two holes ( a little bigger than a pencil)in the inner fender right in front of where the wires plug into the coil.Looked like mounting holes for something but as there was nothing there I patched them with silicone ( was going to weld them but it`s plastic)and we`ve had it in rain/snow since with no problem.Hope this fixed it.
Rub my Belly
Joined: Jan 2004
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From: Lawrence, KS
You might check the connector at the coil. Especially the green wire that goes into the connector. Sometimes that little green wire will break underneath the insulation and cause the same problem as you described. I've seen that problem on at least 2 Bronco II's now. I've had my coil submerged under water several times without out any ill effects.
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