Coyote wiring harness questions

[cob427sc]

I am thinking about installing a Shelby 500 engine in a 33HR. The engine has only 940 miles and includes the entire engine harness, computer, ect., along with allthe required misc. parts. My question has to do with the FFR instructions for setting up the coyote and buying the Ford Racing harness. Why can't I use the original Ford engine harness and computer? This is set up to run the engine while monitoring the supercharger and the intercooler pump/radiator and it doesn't look like the Ford Racing harness is set up to do those functions. I'm sure there may be some interface problems with the FFR supplied harness, but what other significant issues might I expect? I've built a ton of cars (including 7 FFR cars) but the computer and wiring are always my biggest headache.

[michael everson]

I think its a packaging issue. I believe you need to use all the parts that go with that engine. Computer, body control module steering column or at least the ignition switch portion. I suppose it could be done, but is it worth the hassle over a Coyote?
Mike

[Alan_C]

I would look at the Mustang Forums or tuner for more information. If the computer can be reprogrammed, the security features that require the column, gauges, and other related parts can likely be eliminated. I have to believe the GT500 engine has been transplanted before, someone knows the answer. When I built my MK4, I used a 2004 Mach 1 DOHC engine. The PATS and other dependencies was eliminated by reprogramming the ECM with a chip, now the chip is not longer needed with the newer programmers. Someone like Lund Performance could be a source of information. The so called terminator motors from the 2003 and 2004 Mustangs were transplanted, I imagine the GT500 can be too. Art at WireDiet modified my OEM harness for use in the MK4, he could be a source of information as well.

[cob427sc]

Using the Shelby motor is just my thing, basically because I have one sitting in the garage. I believe the biggest issue is trying to pare down the wiring harness that serves the rest of the car to something that's usable. I looked into the Ford computer and harness that most everyone uses with the coyote but the people at ford say it's incompatible with the Shelby engine as it does not support supercharger boost functions, etc. They suggested going to an outside firm to work out the wiring issues. The PATS (anti-theft) can be programmed out as I've had this done several times before. Since I have everything stripped out from the crashed mustang right down to the complete wiring harness and the steering column, I've got to believe this can be made to work, and since I got all the parts for less than a coyote crate engine -- why not?

[jiriza84641]

You probably can look into an outside tuner, that can access the ECM and perform any reprogram required!

[i.e.427]

Check with Holley. We're working on a 4.6 DOHC engine from a 2004 Mustang and picked up a TerminatorX system so we could ditch the stock Ford wiring nightmare.

[cob427sc]

I spoke with Art at WireDiet and he sees no major problems other than lengthing a couple of wires and cables once all the remaining junk is removed. The computer will need to be programmed to get the PATS out but that's not a big deal. I did a 2000 4.6 engine in a roadster in 2000 and stripped out the harness to make the engine run and used the FFR harness for everything else. This is basically the same although with all the sensors, controls, wires, etc. it is a little more intimidating.