Join Date: Aug 2011
damanx is offline
Re: Converting to EFI. Finally...A little help
Now, with the 8062 ecm and the AMRW prom, your base timing is to be set at 0 degrees. To get that, get the engine up to operating temp, and yes you can bump the distributor initially to get it to idle a bit smoother, but once warmed up, disconnect that tan/black stripe wire. Then use the timing light to set to 0 degrees.
Do NOT set it for more or less. 0 degrees. If you set it or more than that, the esc is going to control it anyway and you will end up having more knocks, which the ecm doesn't like anyway.
Next thing you are going to have to do after that is to set the idle speed via the throttle stop screw and make sure the IAC counts are within 10-30 at idle.
This is where having a cable from the ecm serial data line to the serial port on your computer along with Tuner Pro RT will be fun to use.
As a matter of fact, I've got to go out now and get the engine warmed up, swap ecm's to test the spare I picked up yesterday. If it tests good, then I'll leave it in because I've modified the bin file a little more from the bin that is currently in there and want to datalog the changes.
I'll build you a cable for that. You have a working lighter socket correct?
1985 GMC S-15 Gypsy ext cab.
3.4l, Edelbrock intake, a 4.3l throttle body controlled by an '88 TBI ECM. 700R4 with 3.73 rear. Real time tuning using a CF-30 Toughbook with a Moates Ostrich 2 emulator.