Kevin S.

What wiring options do I have ? Originally I was planning on using a stock harness with megasquirt ms3.

I'm looking for the least brain damage and most cost effective solution.

I want to run speed density. Have the least fail points in the system. I guess I could just go the easy way and run a carb setup but I like fuel injection.

What do you guys recommend for running speed density ? do they make an emulator for the stock fox body ecu ?

Thanks all!

Lateralgeez

Reading your post I found I had similar questions. Top of Google search was this very helpful article
http://www.diyautotune.com/tech_arti...ng-pnp-faq.htm

Apparently it plugs right up just need a vacuum line. Then calibrate all the sensors with the software.

Would be great to hear some experience as well.

97miatam

I took out all of the Miata engine harness. I bought an ms2 and the wiring harness from diy. I bought a factory harness for all of the sensor plugs. This way I will have new wires and tune ability. It is the most cost effective way I could find to have a robust system. You could always find a stock ecu and harness from a mustang and just run it. But the cost of a ford ecu and harness was the same as an ms2 and new wires.

Kevin S.

I think I may go this route! With a good factory harness and the pnp megasquirt ecu it should be (hopefully) pretty easy.

What about running the ford engine harness though, can I use the factory mazda fuse box or should I try and find a ford 5.0 harness, and all fuse boxes at a junk yard?

Thanks !

tbone heller

The Ford engine harness does not run through the fuse box. Yes, you can use the existing Mazda fuse box for all of the other crap.

Kevin S.

Well don't I feel dumb...lol

What I meant was the fuses for the engine harness. What do I need to run for the ford harness to work? Should I just buy something generic from the parts store that is a basic fuse holder? Did I say i'm a wiring noob? lol Thanks for helping all!

tbone heller

No fuse. The Ford harness has a fusible-link built into the harness where it bolts up to the 12v connection at the starter solenoid (assuming that somebody didn't butcher the original harness).

Kevin S.

ah ok! So I don't need to run any additional fuses then? Fantastic! Should be relatively easy ( I hope) with a 5.0 harness, megasquirt plug and play ecu and have mccully clean up the harness and make it hopefully as plug and play as possible for my wiring inept self lol.

MRM331

I can also take out all the stuff you don't need with the MS2 like EGR and such. Let me know

-Jason

Kevin S.

awesome! I just sent you a pm sir.