Alright guys, i need some help. I have a 1989 standard trans f150 with a 302 that i will soon be swapping with a 351 that i'm getting out of a rolled 1995? f250. I'm wondering what ECM i will be needing since the 95's computer is for an AE40D. Not to mention i would like the MAF set-up if there's an ECM available for that in the 95. For some reason the truck isn't MAF....unless its located in the Air box which is missing from other part seekers. I looked for the harness that would plug into the MAF if it did exist, but i didn't see one.

I already know that a 302 MAF would run a 351....but not perfectly....and the "not perfectly" is enough to bug me.

 

That's misinformation, I have been running a 351 with cam, ported heads, and full exhaust system on a 5.0 mustang computer for 8 years, it idled smooth as butter, pulled as long as I kept my foot in it, and passed our emissions sniffer tests. If it wasn't running at full potential you would never know it from the drivers seat.

With a manual tranny you have a lot of choices, you could use a stock SD computer from any truck with a 5.8 and manual or C6 auto tranny, lots of those around in the late 80's and early 90's. You could also use any one of the Mustang 5.0 computers and add the sequential injector wiring and MAF harness from a truck or car. This is what you want if future upgrades are in your plans, the mustang computers are well documented and tuning files are available to download from the web for the popular tuners.(Tweecer, EEC Editor)

 

What year trucks have the sequential injection????

 

All the mass air trucks.

 

Thanks man!! My truck has mass air and been wondering about that..

 

So do you have the MAF set-up? I'd assume so since you're cam'd and additional upgrades. And if i were to go this route, if i remember right, i'll have to first set my firing order first from the distributor, but what do i do with the sequential injectors while still using a 5.0 computer? Do i hook up the injectors as a 5.0 firing order or the 5.8's?

 

Yeah I have the Ford mass air conversion kit for these trucks, it includes an overlay harness for the injectors and mass air meter, the mustang computer and MAF meter, and a single outlet air filter cover.

The 5.0HO and 5.8 share the same firing order, so you don't have to change anything with the injector wiring when using a mustang computer on a 5.8. And even if you were just converting a non-HO 5.0 to mass air all you have to do is move 4 of the injector wires to different pins at the computer connector.

 

Although i can use an HO ECM and MAF and etc.....and I already know i can find a standard ecm with the speed density and bank firing for a 5.8. I'm still curious if they even have a 5.8 ecm with MAF already. Either for truck or mustang.

 

Yes there were OBD-1 mass air 5.8 trucks in 94 and 95, but they are rare compared to the 5.0 versions and most if not all of these trucks had the E4OD tranny. This will create some headaches because the computer will be looking for the auto tranny to control , so you'll have to figure out what is needed to prevent it from throwing codes and acting up. It's probably not a hugh issue but something else you'll have to deal with.

 

that only applies if your running a M/A EEC with only 1 O2! if there are 2 o2 Then you cant flip flop wires. Ford Fuel Injection!

 

YOUR BEST BET IS TO RUN A MUSTANG COMPUTER. wiring harness from 88-93 stang or harness from a 86-91 crown/marquis will give you your sequential inj. but the CV/GM are not wired for mass air you'll have to run the wires yourself, which there kits for that! fordfuelinjection.com is a very good site . i'd advise you go ther and read.

 

so.. If I have a 5.0HO with the 351 firing order, and bought a 351 block/heads/intake, i could bolt my current exhaust up to it, reinstall the fuel rail with different injectors, not touch my computer, and it would run fine?

edit: on second thought, the exhaust would be wider, just like the intake. So: new injectors, or no?

 

if you go from 19# to 30# inj you'll have to get the eec chiped for that. otherwise yes!

oh, BTW if you use aftermarket heads you'll have to use headers! that is a solid fact! whether they be shorties or longies.

 

The 5.0 and 5.8 motors use the same injectors.. 19lb. Because the 5.8 block has a taller deck the intake valley is wider so it requires a 5.8 specific lower intake and fuel rail. The stock intake for the 5.8 truck motor is completely unique(both upper and lower) and not interchangable with the 5.0 version at all, the intake runners are a different size and shape.

 

au contrair... that intake WILL fit on a 351 lower!!! its been done, i've seen it. its actually better than the 351 upper! but i would suggest you cut the ports on the lower to match the upper. It amazes me the stupidity that runs around the Ford R&D to put such a F- up intake on the 351 and a better one on the 302? BTW the lower 302 intake is the exact same as the Holley SYSTEMAX crap!
that is the one reason i installed a trick flow on my engine! if I were playing stock or slightly modified F series again, Id go with a Edelbrock truck intake for sure!