standalone ECM and TPI?

[gbodystuff]

If I were to run a MegaSquirt or any other aftermarket fuel injection system, what would I need to retain from my factory TPI? I have a whole 89 Trans Am TPI out of the car but tracing down the VATS stuff, various relays, etc. was a pain. Taking the dash out wasn't as much of a pita as I thought at first....but I was curious as to the easiest route. Ideally, I'd like to just keep the fuel injector harness and go aftermarket from there. Thoughts?

 

[Doober]

Have you looked at DynamicEFI as well? You can use the original ECM housing and the learning curve isn't quite as steep (I don't think anyway).

 

[gbodystuff]

I found some hardware that serves to re-flash the PROM for the factory ECM...an emulater it's called...a buddy of mine is a Ford Mustang nut who is interested in helping design a program for use with my TPI once we get the water cell going. The OBDI is easy to manipulate for what I intend to do so we might start there then possibly go to a FAST or MS system. Baby steps first....lol.

 

[jrdrag]

As long as you have the factory wiring diagram and the connector that ran to the ecm, the MS is as easy as cutting the plug off and installing a new one with the wires in the correct places for MS. I did MS and although there were some challenging times, as long as you follow their guide you will do fine. MS is a teaching tool. You HAVE to learn how to tune an engine to use it. I am and engineer so I enjoy know how everything works.

 

[big-angry-hillbilly]

FAST is good, and painless also makes a wiring harness for the engine, but it is primarily designed to use the factory ECM....so no real point in spending six hundred bucks on a harness to chop the connectors off the end of it, in my opinion.

 

[Doober]

MS is no less involved than DynamicEFI far as I can tell. Best bet is to probably retrofit a stock TPI harness and burn the chip you need.