Technically all Ford EEC-4 computers are compatible with any tuner or chip, they all have the same J3 port at the back of the case where the module plugs in. But only a select few EEC families have been fully "decoded" where they read the memory locations and map that to specific functions of the EFI system. It's mostly PCMs from performance vehicles like the Mustang and Lightning that have been decoded and it sounds like SCT has further limited their efforts to Lightning models.

I have a TweecerRT which is a full tuning system that you control with software on a laptop, there is a module that plugs into the EEC that stores the "tunes" and it has 4 memory locations and a little rotary switch so you can have 4 tunes loaded at any time. The Moates Quarterhorse is another tuning system that has similar capability. The big benefit of these systems over a chip is that you don't need to go back to a shop and pay more money to make small changes or when you add parts to the motor, you just take the vehicle for a drive, look at how it's performing and burn a new tune.

Now with a tuner or chip you can make a PCM compatible with any combination of injector, MAF meter, and engine size, these devices override the factory programming and give you access to everything so you can literally do anything you want.. though from what I have seen chips are often far more limited in what you have access to and you will quickly exceed what a tuner system costs paying for chip tunes to get a motor dialed in. And yes once the motor is dialed in the is no need for access to more than 1 tune unless you want to do something like a valet setting.

 

I had a friend with a F250 diesel that he put a banks tuner in it that did something similar. He had a tune to get good gas mileage for daily driving and a few other tunes for towing and off-road. That was kind of my plan going with this set up

 

That's fine in theory.. but your motor doesn't have forced induction so there isn't anything you can change that will give it substantially increased torque for towing or significantly better fuel milage, once it's dialed in it is what it is.

 

Meaning to post this for some time.
Please feel free to give me some "REP'S" on you way out.

 

and my Orange one is 4x4 Electronic, the 4x4 selector wiring is a separate module on the pass side.

 

Ok I may just leave it at one tune then. Can I use a harness from another vehicle or would I be better off using a harness adapter from a place like rjm or fiveoligy?

 

I have purchased Airbox with Ducting, Complete Wire Harness for E4OD, and Computer for a 5.0 F150 from a gentleman that runs the parts counter for an auto recycler. He was absolutely the BOMB to deal with and I told him about all the guys wanting to do MAF conversions to our trucks. He's going to start putting kits together for doing the conversion. He was guessing about 600.00 for everything needed. His name is Don and the phone # is 1-877-665-5444. They also have an ebay store "handwparts". He was supper easy to deal with and KNEW what parts were what, and best of all he "Gave A Rats ***", which is the hardest thing to find. Just thought I would pass the info along. I asked him if he minded passing along the info and he said Please Do. He has individual parts too. My harness from him which is complete was 250.00.

 

I may check with him on a harness. I know RJM runs about 225 with shipping for the adapter harness to convert the one I have but they don't offer instructions. I don't know what fiveology will charge for just a harness. They only show a kit on their website. They do offer instructions and a friend who does auto electrical on the side said he would help me with it. As far as intake goes I found an intake kit on eBay that is similar to the 4.9 intake tube most people use that I am going to order when I get closer to time on doing the conversion. I will probably put a name brand filter on it instead of the one that comes with it.

 

Would a harness from a MAF mustang or t-bird work? I can find a few of this on eBay and other recycler websites for around 125-150 including shipping

 

So I have been working on sourcing a harness for my conversion and was emailing with Fiveology racing a few weeks ago and this was the email they sent me regarding my AKC0 PCM

The PCM you referenced, P/N F8TF-12A650-NA with calibration code “AKC0”, is not compatible with our F-Series overlay harness. The main engine harness layout for this computer is based on a 1994+ 5.8L wiring diagram, which varies dramatically from your original 60-pin connector layout, so much so that attempting to utilize such would require reworking more than two thirds of your current pin locations. The “AKC0”, supplied with Ford Racing LIGHTNING MASS AIR CONVERSION KIT P/N M-9000-L58, is intended to be used with CONVERTION/INJECTOR ADAPTER HARNESS P/N M-12581-L58 which includes provisions for the wiring variations referenced above. Our kits are provided with PCM’s sourced from 1994+ 5.0L F-Series applications, which closely mirrors your current 60-pin configuration, and are paired with mass air meter F5UF-12B579-AA. Please let me know if I can assist you further.

I have checked on all the Lightning sites and the harness they are talking about has long since been discontinued by ford and impossible to find. Will any harness work with the set up or did Ford engineer the parts of the Lightning MAF conversion kit to only work together?

 

The DIY method of attaching sequential injection and the MAF meter wiring to an SD truck is to disassemble the PCM connector and insert wires(with pins attached) that you have salvaged from another MAF harness, this salvaged wiring could come from a Mustang or truck.. doesn't matter as long as the wires are complete from the injector and MAF connectors all the way back to the PCM connector. You could even make your own using pins and connectors from RJM and a spool of wire.
Now.. once you have the PCM connector open to insert wires you can also move pins around to match whatever PCM you are using, directions for opening the connector are found on www.oldfordinjection.com.

 

I don't want to attempt making my own harness and I don't want to owe my friend that big of a favor. I am going to look at the link when I get home and can see it on the big screen. How much more difficult would it be to modify a MAF harness? Or would that make it easier? The local u pull it has about half a dozen trucks on the yard that could be a possible donor and they run 25-35 as long as it is just the engine harness

 

Unfortunately replacing only the engine portion of the harness does nothing for you, all those extra wires for the MAF meter and sequential injection don't exist in the SD harness between the block connectors and the PCM, so you have 3 options and and these 3 options only.

1)Cheap, easier to mess up, least robust due to splice joints: Replace the whole engine bay harness right back to the PCM with one from a MAF donor truck, this will involve cutting and splicing wires however as there are some that are hardwired to the chassis and dash harnesses.

2) Cheap, most flexable, most robust: Make an overlay harness from a donor vehicle, take apart the PCM connector and insert the pins for those wires and move any others necessary to make it compatible with whatever PCM you are using.

3) Easiest but most expensive: Buy an aftermarket overlay harness with the piggyback connector that goes between the PCM and original truck harness.

 

my plan was to try to pull a complete engine bay harness to have everything i needed. like i said i do have a friend that does automotive electrical who has agreed to help me when i get everything together. do you have a print out of the link you posted? With RJM being out of commission due to Ryan's health the site has been taken down

 

Oh sorry.. I messed up the link typing it from memory, it's Fuel Injection Technical Library