Please help I am stuck in Indiana trying to get home

112motorsports · #1 (**permalink**) 11-27-2011, 11:50 AM

So I have an early 99 F 350 and I am having an electrical gremlin that I can't figure out. A little background I got to my folks house for thanksgiving and I went to start the truck Friday morning and nothing. It would just crank and crank. I had it towed into to a truck repair center and they determined the main computer fuse was blow due to the fuel heaters shorting out the circuit. They in turn replaced both fuel heaters and off she went. So getting ready to head back to NC and it is raining here and after I started the truck I turned the wipers on and the truck wanted to die. This has happened in the past so I replaced the cam positioned sensor two weeks ago and it seemed ok. Now when driving the truck it will all of a sudden surge suddenly all the dash lights will illuminate and I have no throttle response. It comes right back to life and run fine. I have tried to duplicate this with the wipers on and off and I can't seem to nail it down. I don't know if there is a faulty ground somewhere or what. The truck has five month old batteries in it, and my scan gauge isn't storing any codes. I need help as I have to get home tomorrow. Any help would be greatly appreciated. Thanks again.

NoRalPh · #2 (**permalink**) 11-27-2011, 11:58 AM

There are two little wires that go to the OD sw at the end of the shift selector that commonly chafe through. This can cause a short that effects both the dash and TPS (Throttle Position Sensor) located at the top of the pedal. You might want to take a look at those.

The last post in this thread has a great step-by-step -> 99-03 OD wire fix

atvrider93 · #3 (**permalink**) 11-27-2011, 12:00 PM

to be honest that sounds like a CPS. which one did you replace it with when you changed it out?

112motorsports · #4 (**permalink**) 11-27-2011, 12:02 PM

I replaced the one under the water pump. I used on OEM sensor from Ford. Is there another one? I wasn't aware of more than one but I have a spare on in the glove box I can swap out. Thanks for the help and I will check the wires by the pedal. Thanks again.

112motorsports · #5 (**permalink**) 11-27-2011, 12:32 PM

So I read the OD thread I failed to mention my truck is a manual so I don't know if this would still be an issue on mine. I just drove the truck again and it surged when I turned the wipers on but did it only once. I went and stocked up on rainx as it looks like it is going to be raining my entire trip home. Is this only a problem when the wipers are used? I just dont want to get stuck with my wife and 3 month old on the side of the road where I am stuck and have no help. If you know any other possible solutions would greatly appreciate any and all help as I am in a bit of a pickle.

wadmalawjoe · #6 (**permalink**) 11-27-2011, 04:50 PM

What a bummer..... sounds like some kind of short, I'm subscribing to this post, keep us posted to what you find, hopefully some others on here will pitch in and can help you figure it out.

sniper_101 · #7 (**permalink**) 11-27-2011, 05:21 PM

Main harness on the PCM tight? Water in the CPS socket/plug? May want to check over all the electrical plugs in the engine bay and use some dielectric grease on them. Will it die when idling or only when moving?