Fox T-Bird/Cougar Forums  

I have a confusing situation here: 

My friend was at a swap meet and found a guy selling Mustang parts, so he grabbed an ECU for me from a guy that said it was from an '88 Mustang 5.0.  (I'm collecting parts for an HO swap).  He drops it off at my place, and we are completely dumfounded by the code on it. 



It says TB over where the code should be, but that doesn't match up with any code on the Old Fuel Injection website.  The part number is E6ZF-12A650-B2A-MR, but is also noted as a REMAN.

The closest info I could find was a PN search on Rock Auto that showed the PN as an equivalent to an '85-'86 Mustang, Capri, LTD, Marquis, and E series.  That's a pretty wide range of models, and especially confusing because the 5.0 in the Mustang switched from carb or CFI in 85 to Speed Density in '86, and any smaller engines weren't shared with the full size cars and vans. 

So, help me out here.  What do I actually have or how could I figure it out?

My buddy at a Ford dealer looked it up for me and he says it comes back to a 85-86 Mustang/Capri 2.3L non-turbo.

I believe that's the case.  Looking at the pinout, pins 12, 13, 14, and 15 should be connected to Injectors 3, 2, 5, and 6, and all of those pins are non existent on the computer's plugin. 


Pin #1 is in the top right.

Here's the pinout diagram I used, it's for a MAF setup, but everything but the MAP/BAP should be the same I believe. 


Jangus,  I actually have his phone number, my friend grabbed it for me because of some injectors he would sell to me too.  Maybe I can get those in trade for the computer. (I'll make sure they're correct this time too).  If I can't get him on the phone for some reason, I'll send you a PM. 

Thanks everybody, I'll get it sorted out now that I know what I'm dealing with.

I believe that's the case.  Looking at the pinout, pins 12, 13, 14, and 15 should be connected to Injectors 3, 2, 5, and 6, and all of those pins are non existent on the computer's plugin. 


Pin #1 is in the top right.

Here's the pinout diagram I used, it's for a MAF setup, but everything but the MAP/BAP should be the same I believe. 


Jangus,  I actually have his phone number, my friend grabbed it for me because of some injectors he would sell to me too.  Maybe I can get those in trade for the computer. (I'll make sure they're correct this time too).  If I can't get him on the phone for some reason, I'll send you a PM. 

Thanks everybody, I'll get it sorted out now that I know what I'm dealing with.

If the ECM is not confirmed either by a factory number or a reman identification number BUYER BEWARE. This is why in most cases a stand alone system is normally your best bet or a known good and correct ECM NUMBER. Just me could be wrong. My ford guy says that ECM is a 4 banger i did not count the pins. How much did it cost you??? If it was cheap use it as a paper weight and chuck it up to experience.  By the way how do you know the ECM is GOOD. Even if it has the correct numbers and application the unit just might be a DUD??? Just a thought!! Never buy a pig in a poke. That is unless it was dirt cheap and you took a shot. Good luck!!