Hello im wondering if a 5.0L engine computer is the same as a
7.5L computer?
The Mitchell CD's at work show the 5.0,5.8 and 7.5 wireing harnesses the same...so im wondering if the computers are too.
(broke the case ground pin off the ecm) thats why my question.
Thanks
Groundpounder

 

If the serial numbers are the same, then they are identical. If the wiring is the same, it will work but the programing will be off for your vehicle, ie. fuel curve, spark advance, egr flow etc...

 

Thanks for your reply.
was also wondering if there is a mass air kit for the7.5?
Thanks again.
groundpounder.

 

I HAVE "ADAPTED" A 1992 5.0 MASS AIR PCM TO MY 1996 F-350 7.5. I HAD INSTALLED A BIG CAM AND CJ A460 HEADS AND THE TRUCK RAN VERY BADLY. DIAGNOSTICS SHOWED THE PCM WAS IN "LIMP MODE" AS IN LIMP IT TO A REPAIR SHOP AND GET IT FIXED. SPEED DENSITY PCMS CANNOT RUN ANY AIR/FUEL MIXTURES OUTSIDE OF ITS TABLE OF RATIOS(FIGURED THAT OUT WITH BREAKOUT BOX AND A GOOD GUESS). GET THE SCHEMATICS FOR 5.0 PCM AND 7.5 PCM, FUEL INJECTION HARNESS FROM 5.0 MUSTANG MASS AIR, 24 LB/HR MASS AIR METER, ONE MORE O2 SENSOR(TO INSTALL NEXT TO EXISTING O2). RE-ARRANGE FUEL INJ FIRING ORDER ON PCM WIRING HARNESS(JUST LIKE WIRING SWITCH FROM 5.0 SPEED DENSITY TO 5.0 MASS AIR), SWAP OUT FUEL INJ HARNESS FROM 5.0 S/D TO 5.0 M/A, WELD BUNG FOR SECOND O2 AND WIRE INTO PCM SOCKET. ADAPT MASS AIR METER TO 7.5 DOUBLE INTAKE, WIRE M/A WIRING INTO PROPER PCM SOCKETS, I THINK THAT WAS EVERY THING, REALLY ALL I DID WAS COMPARE PCM SCHEMATICS AND MODIFY TO SUIT THE 5.0 PCM. I MADE THIS SOUND AS EASY AS THE GUY ON TRUCKS! DOES, BUT THIS WAS INCREADIBLY DIFFICULT FOR THE AVERAGE GUY (ME!).THE ONLY PROBLEM IVE RUN INTO IS AFTER TEN OR SO SHIFTS THE CHECK ENGINE LIGHT COMES ON TELLING ME A MISSING 2ND TO 3RD SHIFT SIGNAL MISSING(THE 5.0 PCM HAS A CHECK SWITCH IN THE TRANNY FOR CRUISE CONTROL) AND A IDLE RICH ALARM(I HAVE A .550,260/278 DUR CAM). OTHER WISE IT WORKS GREAT. FOR MY NEXT TRICK I WILL STROKE THE DANG THING!