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subford · 11-07-2014, 11:35 AM

Ford does not put a part number on any parts so the number you see is an engineering or drawing number and not the part number as they change the part number from time to time.
A part number would have a "Z" in it, with the "F" that is a engineering or drawing number.

To translate the letters F6TZ stands for:
First "F" the decade and F is the 1990's.
Next is the year in the decade the part was first used, F6=1996.
Next the "T" meaning it is used on a truck.
Next the "Z" is a part number and just about any other letter is the engineering or drawing number in your case "F".
Then you have "12A650" and that is the base number of the part. In other words all of the PCM Computes by Ford have this same base number.
The ending letters as in AJA zero the part in to a particular application.

I hope I made this all clear enough.

subford · 11-07-2014, 11:39 AM

Note that all part stores and salvage yards go by the engineering or drawing number most of the time.
Only Ford use the part number and it is rare to see a part number on any site other than Fords.

oldcamper · 11-07-2014, 11:47 AM

ok got it! sorry to be such a pain. we are ordering the first part in that list and will post later how it works. thanks again for all your kind help.

subford · 11-07-2014, 12:17 PM

Here is your parts list and vacuum diagram.
I hope this makes it clearer also.

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oldcamper · 11-23-2014, 10:25 AM

Well here's the "end of the story" so to speak. We got the new computer and put it in and it burnt out again!!! So hubby bypassed the computer and it started and we got it moved into position for the Iowa winter. Not sure what's going on with it but for us nothing until next spring as we live in Iowa. Thanks to all the help and diagrams Subford and to everyone else that played a part in trying to help us. We very much appreciate all your help. Have a good winter and perhaps we'll try again in the spring. Diann and Vic