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1994 Ford Mustang
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Discussion Starter · #1 ·
I want to upgrade the ecu in my 94 GT. Currently running a T4M0 with quarterhorse with a Cobra tune. It seems with the right wiring and tuning can run a newer EEC-V ecu, which would give me OBD-2 and EDIS (or even COP?). I've started gather parts, cam sync and crank sensor from explorer. What EEC-V ecu would you recommend? It seems like ones running CDAN4 (96-97) would work, anything better?
 

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I've gathered that the tuning devices like the quarter horse do a very good job with tuning most OEM PCM's.

Each next generation of computer is a little better/faster than the last. If you are working with a milder engine combination, than what you have should be virtually as good as any newer PCM's and their result after tuning. If you have plans for boost or more serious engine modifications, then a newer PCM might benefit, with easier tuning and slightly better results.

That being said, I like the late 97 Explorer the best for engine swaps to other Fords. That one has no PATS, and it's improved over the 96 to early 97 PCM system.

There's more to those Explorer systems than most people know of, I would avoid it unless you can do the whole thing(the whole front dress(accessories, water pump etc) from the 302 Explorer. Swapping those PCM's into your car would be easier with the actual engine/trans harness, but you could modify your wiring with some time and wiring pigtails. The Explorer has a crank sensor and special balancer(the pulley does not bolt on, it's built in, and set back farther than the Mustang(the 94/95 too)). That would require a modified balancer or somehow adapt a trigger wheel to a balancer. The Explorer timing cover has mounting holes for the crank sensor. The distributor used on those is a cam synch, 96-98 are the same three wire version. If you went that route, you'd have to program out the transmission functions, to stop an error code. It's made for the 4R70W, the 97 PCM is for the analog DTRS trans(pre-1998). The late 97 has external EGR, like the 94/95 Mustangs, with different EGR and sensors.
 

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If the car runs good with the eec iv, it’ll run the same with an eec v. The cbaza strategy is actually pretty capable.

The edis is a good setup, nothing wrong with it. I’m sure somebody out there could make coil on/near plug work on a 5.0 mustang using a factory ford eec. That guy isn’t me though lol. So I ended up taking the easy route and doing it with a ms3x based setup from stinger. Best move I ever made.
 

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Discussion Starter · #4 ·
I'll be staying NA as the car is mainly used for Autocross. I'm thinking with OBD2 I could datalog ECU channels (such as tps and rpm) with GPS on my tablet setup.

The wiring seems pretty straightforward and I can figure out a trigger wheel and mount for the sensor.

I've seen some people getting the ECUs from town cars, crown vics, and mark vii. Why not mustangs?

As far as aftermarket, I was (or am) going with the megasquirt from stinger with COP. But it's out of the budget right now. I think I can do an eecv with edis for much cheaper and it would run just as good.



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Discussion Starter · #5 ·
I'll add the car runs good right now. EGR is disabled and a few other small tweaks. But I'm upgrading to aluminum heads, N-41, and holley system max. So while in there might as well upgrade a few other things

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The OBDII began in 1996 Fords. Most all use crank sensors, the F150's with 302 or351W I'm not sure what those had for a distributor or balancer type. The Explorer 302 was basically one step before the COP systems began in most 99 modular engines. I'd say stick with something that uses the normal SBF balancers and bolt on crank pulleys, that's easier than dealing with a whole new front dress or modifying a balancer as I did(28oz for my 347).
 

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90 Mustang 5.0 5spd, 400+ HP
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Holley makes a new computer system that plugs into the factory Fox Mustang wiring harnesses to run the engine. It costs around $1100 I think and has a hand held programmer and tons of other cool features. Oh yea, it's self tuning as well, and can support up to 600-700HP. If I ever decide to switch from the factory EEC-IV, that's the route I'd go.

All that Tweecer stuff + Megasquirt, etc. is just as expensive, if not more, and is complex / confusing for most people. The Holley is Plug - n Play :)
 
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Discussion Starter · #10 ·
I'm thinking about going to the junkyard this weekend. There are several 99 5.0L Mountaineers that I'll grab the cam sync and EDIS coils. I'll look around at some harnesses and ECUs. I'm not seeing any 96-97 crown vic, grand marquis, town car, or mustangs right now at the yards. I'm not sure if other years will work too.

I'm leaning towards the CDAN4 strategy and use Decipha ZXA5 tune to start.
 

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The Explorer 302's all use the same coil packs as the modular V8's, its the same part.

Check on which cam synch you can use, the 99-01 Explorer uses a different kind of signal in those, they only have two wires. BTW, those are not good do use at old age or mileage. Just like a distributor, those will have the bushings wear and squeal, before they lock up. Best bet is to buy the one you need brand new, but only Motorcraft for those. The other brands have bad reputations for having the roll pin shear off. You can buy the aftermarket sensors though, any of those are fine, even used sensors are fine. They are fragile and often removing and old one can ruin it.

The 96-98 cam sync's have three wires.
 

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I'm running a 03/04 maurader ecu with a 96 explorer front dress which uses RZASA strat. I would suggest going over to efidynotunung.com. there is tons of info there about that ecu. Post questions in their forum.
 
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I'm running a 03/04 maurader ecu with a 96 explorer front dress which uses RZASA strat. I would suggest going over to efidynotunung.com. there is tons of info there about that ecu. Post questions in their forum.
What did you have to use or change from the older engine sensors etc, versus the Explorer, and the 03/04 DOHC engine? I recall Decipha or some tuner suggesting a slightly later computer than the early OBDII PCM's, could easily run a SBF. Being a faster computer, it could be better and easier to tune for some applications.

Also, are you using a return fuel system, or what is it to work with the later type system?
 

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The ecu Decipha recommends is the one I'm referring to. I'm still in the process of getting it all working. It's in my 1957 f100. I'm using the stock 96 explorer cam and crank sensors, deka5 shorty injectors, edelbrock carb style throttle body, hpx maf, 03 marauder coils 03 f150 ecu harness with 4r70w trans. I believe I'll need a fuel pressure sensor too and plan on running deadhead fuel system like i have in my mustang. I'm not an expert on what is needed but most of your sensors should work now. You'll need a separate cam and crank sensor so you'll need to convert to the explorer front wrap or an aftermarket crank trigger of some sort that would work with the stock ecu.
 

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Discussion Starter · #16 ·
I'm running a 03/04 maurader ecu with a 96 explorer front dress which uses RZASA strat. I would suggest going over to efidynotunung.com. there is tons of info there about that ecu. Post questions in their forum.
I've been doing a lot reading on that site and eectuning. Efidynotuning wiped his forum and had to start over so Google search comes up with a lot of dead links.

I saw RZASA was recommended for standalone. But having trouble finding additional info and files. I found the xdf file but no bin files so far. I would like to run that over CDAN4 if can find everything.

Does it have to be the marauder ecu? It only had a two year run, so hard to find. I thought I saw it mentioned can use a town car or crown vic ecu.

Then for the F150 harness, recommend 4.6 or 5.4? Or does it matter?

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90 Mustang 5.0 5spd, 400+ HP
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"I don't remember reading where there's a HP limit with the Holley Terminator X system? What aspect of it would not support 700+ HP?"

You might be right. I just double checked and I don't see it mentioned anywhere either.

Here's the link for the Terminator X system to use on a Fox body Mustang..

Holley EFI 550-937F Terminator X Fox Body Mustang 5.0 EFI Kit

"Complete EFI Swap Kit for your Fox Body Mustang with a 302 cubic inch, 5.0L, engine. Includes an engine-specific Main Harness, Ford Spaced EV1 Injector Harness, a Terminator X ECU, and a user-friendly 3.5 in. Touchscreen handheld.

PART# 550-937F"

1072132
 
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I've been doing a lot reading on that site and eectuning. Efidynotuning wiped his forum and had to start over so Google search comes up with a lot of dead links.

I saw RZASA was recommended for standalone. But having trouble finding additional info and files. I found the xdf file but no bin files so far. I would like to run that over CDAN4 if can find everything.

Does it have to be the marauder ecu? It only had a two year run, so hard to find. I thought I saw it mentioned can use a town car or crown vic ecu.

Then for the F150 harness, recommend 4.6 or 5.4? Or does it matter?

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RZASA should be on the site for download. Crown Vic is your best bet. Either the 4.6 or 5.4 harness should work from a Crown Vic or (i believe)02-04 f150 V8. You need to do some rewiring of the harness since you have to cut some stuff that integrates into the relay/fuse box.
 

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Decipha recommended an 01-03 f150 5.4 wiring harness as the easiest to work with on a SBF, and the 03/04 PCM's from any sedan, the Marauder, CV, TC, and MGM.
 

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There is no HP limit on the TermX. The limit will be your hardware/ignition.

I'd just keep what you have and call it good or go straight to TermX or Pro-M if you've got money burning a hole in your pocket.
 
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