Start by reading Programming 101, the the
archives here and at DIY_EFI. Visit
http://www.tunercat.com , then
syty@syty.org, then the GN list. All
have various amounts of ecm info.. There is even a shareware editor to
look at (not directly applicable to our car thou).
Once you have a good grasp on those materials,
it will be much clearer.
Grumpy
Subject: Question from newbie
I have been floating around here for
about a week now. I joined this list to learn how my ECM in my 89 (MAF)
Corvette works. I have an understanding on all the sensors and their
functions and how the ECM uses this data. What I don't understand is how
to change spark maps and fuel maps to fine tune my modified motor. I
plan to build a 383 soon with larger injectors and there is not tuner around
the Pittsburgh area.
Questions are:
1. Where can I learn how to change the program in my
prom?
2. I want to know how to lean the injectors at
idle when in open loop. (idles rich now)
4. I want to learn to optimize WOT
AFR.
5. I want to learn to increase idle speed
due to a larger cam.
What I don't have is an understanding if hex values, prom
address and what they mean. Is there a book I can buy that explains
all of this? Is there such a thing that I can buy that will
let me change my prom program via a laptop and my ALDL
connector?
Finally, if I don't have a good understanding of how
all of this works, I don't want to be a burden to the list so maybe I
should quit the list. I can ask alot of questions!!
Jason