[PancakeShake]

So. I have a harness out of a '94 F-250 (the motor I rebuilt) and I am about ready to buy a computer.

Will this harness restrict me in anyway for my build? 600rwhp, Turbo build.

If the harness will work alright, can I use the F-250 computer that I have? Or should I buy a SN95 or an ECU out of a FI foxbody?

Any input is greatly appreciated.

Pat

 

[Shaker666]

So. I have a harness out of a '94 F-250 (the motor I rebuilt) and I am about ready to buy a computer.

Will this harness restrict me in anyway for my build? 600rwhp, Turbo build.

If the harness will work alright, can I use the F-250 computer that I have? Or should I buy a SN95 or an ECU out of a FI foxbody?

Any input is greatly appreciated.

Pat

It sounds like you're retrofitting the 351W into your '83? In that case I would choose an engine harness and matching computer that best suits your needs. One option might be to use a Fox body harness with GUFB strategy EEC-IV (A9L, A9P, A3M1, X3Z, etc.). Another option would be to use a modified SN95 Mustang harness with CBAZA strategy EEC-IV. Yet another option would be CDAN4 using a '96-97 Crown Vic/T-bird/Grand Marquis harness and EEC-V.

Each system has its pros and cons. EEC-V has the benefit of integrated EDIS8, 4R70W transmission control, and generally better programming. CBAZA and GUFB are proven performers that can be retrofitted with EDIS8 with an external module if needed. GUFB has no 4R70W control possibility, though.

To answer your question however, I would not run the F-250 EEC's. The harness might be useful for customizing the harness you will make your own for the '83.

 

[PancakeShake]

It sounds like you're retrofitting the 351W into your '83? In that case I would choose an engine harness and matching computer that best suits your needs. One option might be to use a Fox body harness with GUFB strategy EEC-IV (A9L, A9P, A3M1, X3Z, etc.). Another option would be to use a modified SN95 Mustang harness with CBAZA strategy EEC-IV. Yet another option would be CDAN4 using a '96-97 Crown Vic/T-bird/Grand Marquis harness and EEC-V.

Each system has its pros and cons. EEC-V has the benefit of integrated EDIS8, 4R70W transmission control, and generally better programming. CBAZA and GUFB are proven performers that can be retrofitted with EDIS8 with an external module if needed. GUFB has no 4R70W control possibility, though.

To answer your question however, I would not run the F-250 EEC's. The harness might be useful for customizing the harness you will make your own for the '83.

Awesome response! Thank you!

If it helps, I am running a TKO600 so I don't need an automatic ECU / harness.

For the most part, could I "plug and play" an A9L / A9P into my harness and get things to work?

I have wired, from scratch, 100 motorcycles (all carbed stuff) so I am comfortable wiring, I just have never tackled an EFI car before.

 

[Shaker666]

If you can find any GUFB or CBAZA strategy EEC-IV, you're in business. Both are 60-pin connector units and should work with your F250 harness. You'd probably benefit from finding the pinout of the ECU you've got a harness for and comparing that with the CBAZA or GUFB pinout. I would probably opt for the CBAZA strategy as its slightly more refined, although I'm sure the GUFB would work just as well, really. Tuneable via a variety of programs, including Binary Editor and TunerPro RT. What programmer are you planning to run? A Quarterhorse would work nicely.

 

[PancakeShake]

If you can find any GUFB or CBAZA strategy EEC-IV, you're in business. Both are 60-pin connector units and should work with your F250 harness. You'd probably benefit from finding the pinout of the ECU you've got a harness for and comparing that with the CBAZA or GUFB pinout. I would probably opt for the CBAZA strategy as its slightly more refined, although I'm sure the GUFB would work just as well, really. Tuneable via a variety of programs, including Binary Editor and TunerPro RT. What programmer are you planning to run? A Quarterhorse would work nicely.

Is there a way to tell whether the ECU is GUFB or CBAZA?

I plan on using an SCT 6600 chip.

Does anyone have access to a decent wiring diagram? Google images is proving useless for me...

 

[Shaker666]

The ECU box itself will have a "catch code" like A9L, X3Z, A9P, A3M1, etc. for GUFB. CBAZA will be different. You can find a relatively comprehensive cross reference on Clint's site: A list of free downloadable Technical Documents Look at the Strategies.xls.

If it were me, I would look at implementing the CDAN4 strategy, but that's because I've had good luck using SailorBob's definition. GUFB and CBAZA can be used in TunerPro, which offers a bit more flexibility, for sure. Decipha and others have done a great service to the DIY tuner community with the TunerPro definitions. It would probably be easier for you to implement a 60-pin GUFB or CBAZA, particularly because you have the 60-pin stock F-250 harness.

As far as schematics go, got a friend who's a mechanic? My buddy printed out some EEC schematics for me and I used them to successfully retrofit numerous vehicles with Ford EEC.

 

[PancakeShake]

Thanks a bunch for the response and the link, looks very helpful!

Trying to wrap my head around all this is going to melt my brain.

As for the CDAN4, that would be an ECM from a 4.6 mustang correct? Just match EMC/Harness pinout and its ready to run / tune?

 

[Shaker666]

'96 Mustang, Crown Vic, Lincoln, Mercury Grand Marquis, T-bird, etc. That spreadsheet will tell you what vehicles to look for.

You'll want the harness and the EEC-V, spend the $25 and get SailorBob's CDAN4 definition, but then you're tied to Binary Editor. If you want to use TunerPro you should stick with GUFB or CBAZA.

 

[Decipha]

the 94 if the same as 95-96 f250 should have the same pin out as the 94-95 mustang v8 / 91-93 tbird v8/cougar / 94-95 f150 v8

if it does which iirc it will, then your easiest option would be to use a 94-95 mustang v8 ecu (cbaza), usually you can find the better automatic ecu's for cheaper than the inferior manual trans ecu's

if you don't mind doing a little fabbing to get a 35 tooth crank trigger and a cam sensor fitted to your engine you can upgrade to an eec-v (96+ ecu) which is what I recommend since you'll have the much better EDIS ignition. If going that route then your best bet would be to go coil on plug and score an 03/04 crown vic ecu from the junkyard, you can custom tune it with tunerpro for free

also keep in mind your 94 f250 ecu would work perfectly fine it would just cost a few more bucks to create the XDF and ADX files to tune it correctly

<post #800, its been real>

 

[PancakeShake]

I can get my hands on a 94-95 5.0 harness with a T4M0 ecu. I'm running a stick in the car. As a complete system will that work in the car? I'm fine with cutting and splicing a few connectors here and there.

Thank guys!

 

[Shaker666]

That harness and ECU is a good find. I think Decipha has a base tune that leverages T4M0 as a bonus.

I think you'll discover that you have specific questions for specific issues as you encounter them during your retrofit. As another bonus however, I think that the Capri had a somewhat modular dashboard in the sense that it looks like it uses off the shelf gauges mounted in a flat panel. That should make things easier should you have/decide to go with custom gauges.

Pay close attention to how the harness needs to be grounded and powered. Not paying close enough attention to this part of the harness installation usually results in unreliable car.

 

[Decipha]

In response to your PM

"I have the chance to grab a 94 GT harness and ECU. Is there anything that would prevent this from working on my build? Connection to the dash harness, sensors, etc.

Very new to fuel injection wiring, I appreciate all the help!"

nope nothing, the eec-iv's are all independent, the ecu does not control anything on the dash, etc... It doesnt even prevent ignition, the ignition module will still fire without the ecu plugged in, you can use it no problem

eec-v was basically the same in 96-98 where as 99+ with digital clusters the ecu sends all the gauge data to the cluster such as vehicle speed, sometimes coolant temp, sometimes tach, etc... all else remains the same though