I just picked up a '97 (old style cab yet) F250 HD with a 460 V-8. It's an unaltered truck and it has a speed density fuel injection. EEC 4 plug in, no OBD II. I assumed all vehicles after '95 would have OBD II and that this would have mass air. The system appears identical to my older '89. Didn't Ford use mass air on the 460s?

 

Up through & including 96 were SD except for the 96 California trucks were MA. I don't know beyond that.

 

Trucks over 8500lb GVWR didn't go OBD-2 until the all new SuperDuty was introduced in 1998, so yeah that '97 is the exact same truck that was offered all the way back to 1992 or 1987 if you discount the body style change that happened in there. 460's were only offered with mass air in California as far as I know.

 

I know that all EFI 460s were speed density, if I remember correctly even the California trucks.

 

Thanks for your 2 bits guys, it makes a bit more sense now. I just assumed that mass air was pretty much standard by the mid 90s, I knew Phord wasn't putting to much effort into that ol horse, which is a real shame. 4:10 gears and the 5 speed will do a lot of work. My 89 has 370,000 miles on it with only a timing chain around 200,000. I pulled the engine at that time with the intent of putting in bearings but they miked up with virtually no wear. It's had synthetic oil since new, along with an amzoil bypass filter system which do doubt has helped. The darn body just has seen to many Minnesota winters. Having my farm on a gravel road doesnt't help as that stuff packs in cracks and crevices for ever. This "new" truck came from Arizona, std cab, 5 spd, big V-8 - could not be sold, my son saw it on Craig's list and it was cheap! Sure don't need a diesel. Thanks again.

 

There were a few OBD-II MAF 460s in California. Someone posted some pictures of one here a while back.

 

The Ford shop manuals show Mass air SFI for the 460 California trucks starting with the 1996 manuals.