Using GM Controllers

[peter paul fenske]

Hi FOLKS

There have been some requests on using OEM controllers for FI.

If you have a V8 perferably a chev normally aspirated the task is 
relatively easy. Order of things to do.

Find a 730 Broadcast GM ECm.  87 up GM v6 to 92, 90-92 F body.
Usually cost me 80$ canadian with harness and sensors.

Buy a calpak for a 90-92 GM fbody # 16151348 Cost is 50$ canadian.

You will have to build the VATS defeat with a 555. You need
30 hz, open collector op, 50% duty cycle( as close as you can get)

Or save the eprom contents, change byte 0016H from 10 to 00 and
change byte 8008 from 8D to AA. then reprogram , , this chip
is a 27C256 ie 12.5 volts program.

Use a 91 camaro wiring diagram to wire up using the J body harness.
Also you need the sensors ie map, knock tps ect. On the tps you 
may have to rewire the plug. You dealer sells the camaro plug if
you can't find one.

You don't need the V6 coilpak. Just wire in a HEI module from a late
model V8 application or use a gm distributer if possible. The hei module
can be driven by any magnetic trigger, ford,chyrco,nissan ect.

Block learn will adjust the fuel curve to stoich +- 10% this give 
a bit of tolerance. If you run out of block learn you can adjust 
the fuel pressure.

If you need more idle speed you can adjust idle to 650 rpm. The 
computer controlled idle speed is 550. Unless the idle is at
150 rpm over set point there will be no error code set.
This tsb fix tends to aleviate the oscillation in idle
you get with a hotter engine.

Anyways I can't give out fuel curves timing ect ect ect. Just too much
flak my way.

Anyways hope this helps: peter