So, for some reason, it was always in my mind that the 460 had throttle body fuel injection. No idea why. I've had the truck for years but I've never had to think about the fuel system that hard! My mind was blown when I popped the head to inspect the IAC valve and was met with two fuel rails and eight port-mounted injectors in my face.

I know that they switched the 460s from carburetors in the late 80's, I just always assumed that they went to throttle body injection like other cars of the time. My question is, was the 460 a port injection system since day one of it being converted? I'm genuinely half suspecting that it was a dealer option in 1990 or an aftermarket kit. Thoughts?

 

I've never heard of any Ford TBI motor...only ever heard of that on Chebbys...someone will clarify this for us, I'm sure.

 

Yes it was port injection from day one. 88 was the first year the 460 had EFI and it has port injection. As for the other motors I couldn't tell you, but I can tell you early 90s 5.0s were the same. Seeing as 87 (I think?) was the first FI year for the 5.0, I would imagine it was port form day one also

 

Huh. When I learned how to rebuild engines, the dodge Magnum 5.2 we used had TBI. I can't remember what year the motor was, but I just thought that it was standard on most 90's truck engines.

 

Ford only did tbi for a couple years. Don't quote me on this but small block Ford cars in 1984 and 1985 had tbi. By 1986 they where efi port injection. Trucks went in 1987. My 1984 f150 was still carbuerated.

 

So Ford trucks never had TBI? That would explain why I've never heard of one.

 

After looking into it no ford truck ever had TBI. TBI was only used in cars

 

Alrighty then. Thanks, guys! I'm pretty darn happy with that info. Although it means that when it comes time to clean 'em out, it'll be a biiiiiit more spendy

 

EFI was an option on 302 trucks in '85 and all 1986 302 trucks are EFI.
The 351 went EFI in 1988 along with the 460.
I have no interest in the 300 so can't say with that one.

 

Yup!

Ford's TBI, called "CFI", for Central Fuel Injection, came out on the 1980 Lincoln Town Car and Mark VI 302's, run by EEC-III. In 1983, the full-size Ford and Merc got it. In 1984, they all switched to EEC-IV to run it. 1985 was the last year for CFI. I liked CFI. You could always tell if the injectors were working... just look down the barrels at them! The only thing CFI didn't do, was computer stabilized idle. I had to fiddle with the throttle dashpot/AC idle boost bracket a lot for idle speed setting.

There were a few other cars that had CFI, smaller RWD cars that I didn't pay any attention to.

I have wondered why they didn't add it to the 302 trucks back then. Maybe the cost issue, as it would have made the 302 trucks different than the same trucks with other engines in them (the gas tanks, wiring harnesses, computer, etc. etc.).

 

At the time I thought it was odd that Ch*vy, that had 4bbl carbs on pretty much all of their trucks before, switched to TBI while Ford, that only used 2bbl carbs on most trucks before, jumped up to port fuel injection.

 

^yes. The 300 changed over the same time as the 302. Speed density systems are bank fire while mass air is sequential.

 

Not that it is 100%, but the 4.9L with injectors (2 Banks, 3 Injectors per Bank, MFI), does not show up in the EVTMs until the 1987 version.

 

What I remember from when I ordered my '85 F-250 new in the fall of '84 was that the only fuel injected engine available for it was the 302. I never really considered the 300, so I can't say 100% that it wasn't fuel injected. But I know the 302 was, and I don't think anything else was in early '85.

(I never really considered the 302 either, I just remember it being pushed at me as a step up over the 2bbl carb 351 that I was looking at, and ended up getting.)

 

The 300 received MPFI in 1987 if I remember correctly.