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Okay so i bought a 1992 f-150 5.8 e4od truck i have been doing some work with this old girl and it runs.... just runs and drives not bad not good just works.. anyway i have been having some issues with it and the only thing i have not changed on the truck is the ecm..
so i pulled the computer out today and i believe to have the wrong computer. not only that there is a jumper ran across it to which i have no clue what its for
the truck runs okay i guess but no matter what always runs rich injectors have been changed 2 new fuel tanks and 2 new fuel pumps new fpr etc. there is almost always a miss at idle. new pickup new coil plugs wires icm etc the trottle never knows where to idle itll start and idle down sometimes around 500 - 600 according to my tac. some days if it sits itll start and rev up to 1500 then drop to 400 back to 1000 then back to 1500. if i drive it around the block it goes back to behaving "normal" tps and iac aswell as throttlebody have been replaced. intake gasket was done and there are no vacuum leaks.
im trying to find any computer that should work with this combo i would love to have the factory one for it but i have no clue how to obtain this info. please if anyone can help i would love it
i love this old truck and i will not get rid of it Help me fix this old girl
What do your capacitors look like on ECM, some time they are easy to spot if bad.
some you have to look twice
Yes one is blown but inside it's waterlogged. When I bought the truck that inner fender was missing so I put a new one in. The wiring is all fine I went through and cleaned it but I never pulled the computer until yesterday.
My codes were. 171 173 179 628
I don't know why it's throwing 628 because the tq never slipps
My 94 threw multiple trans codes from the time I bought it. Days-weeks it ran fine prior to a spate of hard shifts in random gears, then OK.
When it started slipping in any situation, (Zero trans codes) I rebuilt it. Worse when re-installed. Then I found leaky capacitors. Eventually needed a PSOM as well.
PROCESSOR AND CALIBRATOR ASSY., (EEC-IV). OR the PCM.
The number on the unit would be F2TF 12A650-MB for this Calibration number 2-64H-R10.
The Ford part number is F2TZ 12A650-MB for this Calibration number 2-64H-R10.
It goes with a 5.8L EFI engine.
PROCESSOR AND CALIBRATOR ASSY., (EEC-IV). OR the PCM.
The number on the unit would be F2TF 12A650-MB for this Calibration number 2-64H-R10.
The Ford part number is F2TZ 12A650-MB for this Calibration number 2-64H-R10.
It goes with a 5.8L EFI engine.
Subford attached are pictures of my Door stickers, I have a 1992 F250 5.8L with a Manual ZF5. What computer do I need? The PO put a computer from a 1990 truck in it but it has received so much water damage that I cannot even take it apart as all the screws stripped or sheared
out of the housing.
Cameron Kenyon:
PROCESSOR AND CALIBRATOR ASSY., (EEC-IV). OR the PCM.
The number on the unit would be F2TF 12A650-EA.
The Ford part number is F2TZ 12A650-EA for this Calibration number: 1-75A-R00.
It goes with a 5.8L EFI engine.
Cameron Kenyon:
PROCESSOR AND CALIBRATOR ASSY., (EEC-IV). OR the PCM.
The number on the unit would be F2TF 12A650-EA.
The Ford part number is F2TZ 12A650-EA for this Calibration number: 1-75A-R00.
It goes with a 5.8L EFI engine.
The F2TF is a drawing number and the number that is put on Ford parts.
Some auto part stores and salvage yards use this number.
The F2TZ is the Ford part number for the part.
Ford does not put a part number on any parts after 1955.
Use this number when part is serviced at a Ford dealer.
If you go to a Ford parts counter, likely the part that they hand you will have a Z in the number some where & It means it is a service part.
That it was manufactured for replacement & not the first run of parts used to build the vehicle.
If you see for instance a Z in the part # description of a Cardone, or other reman company computer, you know it did not start life in a truck/car & started life on a parts shelf, was put in service, failed & has now been rebuilt/repaired.
There just are not any "new" computers for this generation.
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