Hi all
New to this, I 'm running a 58a in a 1227727 it seems I can't find the correct output pins to run the injectors. Using d3 and d9. I also tried d14 and the engine ran on two cyls ( engine is a inline 4) The engine goes lean at about 90 kpa ( injector pulse width does not change) If 2 cyls are disconected the engine will miss and go 190 kpa . at one time the a1 program was run and the injector pulse width changed . Any ideas?

 

At the bottom of this page you'll find links to the ecm pins and wiring diagrams.

http://www.diy-efi.org/gmecm/ecm_info/1227730/

However, I don't know about running 58 on a 727. Ludi's page may help. Maybe the "missing quad driver" (see the Description for 749) is the problem.

GM P4 ECM Crossreference

 

Thanks Atomictruck,
Now I need to find out where the additional fet output is, guess its time to fire up the ecm test bench project and get the lab scope on it.(mabey two weeks) ??????????
Mikey7

 

I remembered something else (well sort of).

There is a thread in here somewhere that talks about running 58 on a 730. I've racked my brain trying to remember who wrote it... perhaps "funstick" but I'm not sure.

You could try some searches. As I recall the thread talked about what programming changes needed to be done to make it run. IIRC it seemed to be worked out pretty thoroughly.

 

Thanks AtomicTruck
I'm getting closer on the ecm bench (might get it done on time)! If you run into FunStick please herd him my way. I have several projects pending on this setup(one is mine
Thanks again Mikey7