Now that we are figuring out what you got, some may call me 'pedantic', but your going to have to get a pin-out diagram/schematic, and verify with your volt meter, that pins and wires are connected to the main block are what you want/need.

This harness you have, appears to have been modified, and really don't know to what extent.

Your going to have to manually verify the pin out is correct for your application. We don't want to power up, see smoke, or worse have running issues from the pins being incorrect.

I am a firm believer, that if you want to disable something, you do it at the computer.
If your disabling EGR, tell the computer that, don't fake it with a resistor.
Turn the canister purge off, etc.

Quarter horse can do it. Or if your running a stock tune, I can burn you a chip for the cost of the chip plus the cost of shipping as well.
I do have two spare harnesses, one is hacked, one is stock. Could probably build one to suite your needs, as well as a chip so the computer knows what is not connected.

 

Your engine and manual trans looks good by the way.

 

wwhite, your mailbox said it was full
i have no idea what a good going price is. I see them on eBay for hundreds. The one I bought was 50$ plus shipping. Local junk yard said I can come digging and if I find one they’d sell it for twenty bucks, so really no idea. You tell me what you’d want for it. My truck is a 94 f150 4x4 manual standard cab. The transplant motor is an 89 351w. Motor has been completely rebuilt and ready to go with a comp cam 3-255-5 computer friendly cam. We pulled a 300 IL 6 out and already sold that. It’s a project truck for my son. Found in a farmers field and I wanted to teach him how to rebuild the engine and make it run. He wanted the V8 for the sole purpose of having “cool exhaust”. I’ll talk to him about the chip. Let me know what you’d like for the harness. Thanks again for your time. I don’t have an ECM yet, but found one at autozone for a 94f150 351w manual trans for about 200$.
I thought if I went to junkyard might get lucky and find harness and matching ECM. So I’m not sure on the codes you asked about, sorry

 

Alrighty, so, you need a computer and a harness. I have both.
Your truck had a 6cyl, I believe the 8cyl injector harness can swap in, I am not sure.
My inbox is empty, can PM me again.

 

says inbox is full again. haven’t heard back from you. Hope all is well. What did you think about the price/offer I sent??
appreciate your time

 

Hey, yeah, so deleted my inbox and sent files. Can message again.

But, looking at my harnesses more closely, one has burnt/chewed wires on passenger harness, and the other has broken fuel injector clips. I'm not comfortable selling as I wouldn't want to receive it in that condition, sorry.

 

do you have any other harnesses available to sell?

 

Muskyhunter,

Tell you what. If you're not in a time critical situation, you can box that harness up & send it back to Mississippi & I 'll clean it up/repair/label & mail it back to you.

If you razor blade the vinyl tape off the plastic channels & coil it up, it should fit in a postal service flat rate box.

I've got a bunch of spare connectors that should function but may have broken retainer tabs. If you want to cover the return postage, cool. If not, I'll eat it.

Lots of folk here have helped me with parts no charge, so I'm big on the whole "bread upon the waters" thing.

I do have one concern though, The harness from C101 connector back down to the ECU may not be wired the same on your existing 94-6cyl harness as a V8

On SD wiring harnesses, there is only 2 wires that batch fire/ground either 4 or 3 injectors at a time (8 or 6 cyl) whereas on MAF there a 8 or 6 individual wires for the injectors.

The Usual recommendation for 6 to V8 conversion is find a donor of the same year & unplug at computer, then take everything that you can remove without cutting anything.

By the way, the remote mount ICM connector is not a part of the 101 engine top harness, so you don't have to worry about it. That's why it's not seen.

Also there's no need to worry about PS pressure sensor or knock sensor wires/plugs on a 5.8

As an additional point, I know that Michael didn't sell you a piece of junk to take advantage of you.

There's nothing really wrong with what he sold you, I think it was misjudgment on the skill level needed to make it work.

Let me know.

 

I have a 94 5.8/E4OD main engine bay harness in storage. It had an intermittent MAP signal problem that I think was due to damage somewhere in the harness, but worked fine otherwise. This would take care of most of the pin out problems except for those at C101 yes?

He will also need to sort out the older alternator connections I think.

 

Scndsin, appreciate your offer and insight. I don’t think Michael was trying to sell me a pice of junk either. I’m new to this process and it simply didn’t have some of the plugs I was looking for on my engine. He was kind enough to let me refund, and I already sent that back. I did go to local
junkyard yesterday and was able to find an ECM from a 93 bronco with 5.8 SD and auto trans. The entire harness was there but someone at the yard cut 2 feet off between the main plug and the harness at the valve cover. Otherwise it had everything, but I had no clue how to trace and reattach all those wires. I continue to look online. Found an SD harness (94) in Indiana and have a guy checking in Idaho. It’s too bad I couldn’t get the one from the yard yesterday as he said it would have been 20$

 

That would be great R & R. The alt should be the same, 94/94. Only his engine is an 89.

A substitute line could be run for the MAP pretty easy.

Hey Randy, ( rla2005 ) If you have time, could look at, or post a pinout for a 94 5.8-E4 (?) C101, C185 & the equivalent 4.9 pinouts?

Muskyhunter715, what trans do you have? Manual or E4OD, I don't seem to see it listed, but may have missed it.

 

Musky you might want to stay with 94 or 95 harnesses since there we some significant changes between 93 & 94.

Don't sweat it too much. We'll get you through it & make it work right.

 

C185 (PCM connector) is exactly the same for the 4.9L and the 5L/5.8L engines using Speed Density: Truck Computer Pinouts - Old Fuel Injection Web Archive


C101 Pin-outs and Functions are the same for the 4.9L and all V8 gas engines. Further downstream there is a slight difference for how the injectors, IAT, ECT and CANP solenoid are connected. The 4.9L engine uses a connector between C101 and those components, C125. The V8 engines it is a direct connection. That's why using an engine harness for a 6 cylinder versus a V8 becomes a challenge. Add in there are two more injector connectors on the V8 harness. Nothing earth shattering, just those minor variances that can trip you up. The 1995 model year trucks with 4.9L engine the O2 sensor signal were also integrated into C125.

 

I have a 5 speed manual

 

I thought I saw somewhere 93-95 harness would essentially the same from either a 351 or 302…. I found two seperate 93 302’s yesterday with intact harnesses but they didn’t have an air temp sensor in the intake……. I assumed that those were then MAF motors and not SD motors???