1987 f150
NP435
transmission
4x4
4.9 inline 6
Standard Federal Emissions

I'm chasing a misfire(and poor mileage) that I feel and hear almost entirely at hot idle, the only code the truck is producing at this point is 82 which I believe is because of the ancient stock TAB solenoid. I cannot get any reading at all on a KOER test which is why I suspect the ECU.

The ECU has no legible part number or stickers, and the calibration sticker on the truck door is long gone.

Any help would be greatly appreciated, I've done a ton of work chasing this issue.

 

Did you buy this F150 new? It was assembled in Norfolk VA and ordered by the selling dealer from the Jacksonville FL Ford District Sales Office.

1987 F150 4WD 4.9L EFI M/T except CA and/or except High Altitude.

Calibration code: 7-51E-RO = E8TZ-12A650-CKA .. Processor & Calibrator Assy - Except CA & High Altitude // Marked: E7TF-12A650-L1C or L2C or E8TF-12A650-CK1A or CK2A / Obsolete

Calibration code: 7-51H-RO = E8TZ-12A650-CLA .. Processor & Calibrator Assy - Except CA // Marked: E7TF-12A650-K1B or K2B or E8TF-12A650-CL1A or CL2A / Obsolete

Try Rock Auto for a rebuilt // Whatever ID engineering number E4LB-14A459-B is marked on, has nothing to do with the processor!

 

Thanks NumberDummy!

I did not buy the truck new, I got it from an old man who used it as a feed truck in Alabama.

 

Maybe this might help:

 

 

start your own thread you will get more support that way