lost computer again
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New User
Joined: Jun 2006
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lost computer again
i have a 89 f150 4x4 with factory ovrlds and i can not keep a computer in it
is ther a fetr market company that make or repairs the eec-iv ford dealer in tacoma say it is a discontinued part any comments or solutions are greatly appre.... iam replacing wiring to assure this is not creating possible short somewher in the system to cause the above issue
is ther a fetr market company that make or repairs the eec-iv ford dealer in tacoma say it is a discontinued part any comments or solutions are greatly appre.... iam replacing wiring to assure this is not creating possible short somewher in the system to cause the above issue
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
It's probably caused by a short.
The computers are not usually culprits for dieing. There are millions of computers out there that will work for your truck.
Find another truck that has the same engine - and doesn't have a computer controlled transmission (newer trucks w/ E4OD automatic).
Preferably you'll find a computer with the same tranny (auto or manual) but either will work.
The programming changes between different PN computers is so miniscule you won't notice it and it'll run fine.
If you want to be totally sure, you can get a pinout diagram from fordfuelinjection.com or a Haynes manual and go over the pinouts with continuity tests to make sure all the wires are right. Can even get a harness from FFI.
The computers are not usually culprits for dieing. There are millions of computers out there that will work for your truck.
Find another truck that has the same engine - and doesn't have a computer controlled transmission (newer trucks w/ E4OD automatic).
Preferably you'll find a computer with the same tranny (auto or manual) but either will work.
The programming changes between different PN computers is so miniscule you won't notice it and it'll run fine.
If you want to be totally sure, you can get a pinout diagram from fordfuelinjection.com or a Haynes manual and go over the pinouts with continuity tests to make sure all the wires are right. Can even get a harness from FFI.
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Joined: Jun 2006
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no fire no aminal i spent hours with multi meter and in from lbattery along the right side thaen along the fire wall into the cab i get continuitty readings from different wires i have added more body grounds and replaced some when this all started i had no power no lights i got out slammed the door it started and all power came back ii drove about a mile and it happened again &again so i started with the mul meter
thanx
BARK EATER01 out
thanx
BARK EATER01 out
Mountain Pass
Joined: Feb 2003
Posts: 136
Likes: 3
There should be three grounds going to the computer, I believe they come in on pins 20, 40 and 60. They should all read under 5ohms. If they are all good, and youre killing computers I would suspect the 12V suppply going to the computer.
Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Even a short between ground and a signal or reference wire can cause the computer to die. I've never seen anyone on here have this problem but it can happen.
Are you sure you're not shorting stuff while you're testing?
Some sensors have their own ground wires, such as the TPS. If the key is on, and the ground wire and signal wire short - it'll fry the computer usually (example).
Are you sure you're not shorting stuff while you're testing?
Some sensors have their own ground wires, such as the TPS. If the key is on, and the ground wire and signal wire short - it'll fry the computer usually (example).
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testing
no i did not start testing and messing around with it untill the second computer went fun bags up thanks still working the issue while saving for the computer
barkeater out
barkeater out
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From: geneva IL
lets step back a little now you say you got in your truck no power so you turned the key on nothing? you did't hear the fuel pump kick in or the stater when you turned the key or it tured over but it did not start is this correct?
but you did say when you got it running did it run fine? if it did you might have a differit problem not the computer mybe.
but you did say when you got it running did it run fine? if it did you might have a differit problem not the computer mybe.