Have a 91 F250 that came with the 300-6 and a ZF manual transmission. Bought a wrecked/totalled 91 Bronco with the 351w and E4OD transmission. Pulled the 351w and all the associated parts out of the Bronco and put it in the F250 in place of the 300-6. The Bronco engine computer runs it, but it keeps the check engine light on due to not having an E4OD connected to it.
Anyone have a 91 F250/F350 with a 351w and manual transmission that could give me the ECU code off of your engine computer so I will know which one to get? There are tons of them for sale on Ebay, but tough to get the right one without knowing what code to get. I think the code is actually on a sticker in the drivers door jamb, so you would not have to take anything apart.

 

the attached should help

 

I'm not sure what number I put in it, I'll pull it out tomorrow and check. The one I put in was from an 89 manual 5.0. I think I'm just going to try another ECM from the scrap yard hoping that mine is just faulty. I did test the ECT and it shows good but I may replacce that as well. My check engine light is working but the ecu is not storing or showing any codes, the scanner I'm using is compataible to read them but its not, those indicate a bad connection or faulty ecu, so thats were I'm at. My best option would be to find an 87 manual and just use those numbers but I haven't had any luck with that. Maybe I should just switch it over to a carb...... Thanks for all the input and help to this point

 

I guess I just need to find one with a truck program code and forget about the other numbers. Problem is the auto store doesn't show me any of those program codes so i'm just going to the yard for now.

 

Take a look here - https://www.ford-trucks.com/forums/1...l#post12348926