Working on a 1987 K5 Blazer with 350 TBI, 700R4. ACSU $42-1227747 V5.1 xdf, 5.2adx. I've added the CFM throttle body, 1" spacer, salad bowl, AFPR, headers with dual exhaust. Minor mods but enough that a tune is in order.
I have the Moates Burner2, 3 of the 27SF512 chips and Tunerpro RT. I keep my stock ECM, with the ACSU chip the blazer came with, as a backup. I have another 7747 ECM, for tuning, that I soldered the G2 adapter in for the 27SF512 chips. I know how to burn to the chips, but that's as far as I can go. A while back I was working with Mark and we were just getting started. Mark had looked at a datalog for me and said that my VE tables could use some touching up. He was unable to continue because of his health. RIP bud.
My question starts with: Touch up what? Do I go into TP and open the VE tables? There's a spreadsheet with numbers that start low and climb going both directions. I know that I can change the values and it doesn't save it unless I want it to. But what cell am I changing and why? The other day I had someone look at a datalog and they seen that the blazer is running rich here and there.
This is some good advise I was given from my datalog:
For MAP I'm pretty sure you find the VE cell that corresponds to where you are rich or lean, and increase/decrease that value to change fueling. But that's where the differences in the programming comes into play...cruise is very easy (relatively) as in closed loop cruise, you aren't dealing with any of the additional timing or fueling that comes from the parameters that start to affect everything else.
I'd play with cruise settings a bit. Drive a short stretch of road where you can log cruise accurately, find where your BLM's are off, make the change that should bring BLM's closer (start small!) then drive the exact stretch again while logging. You should see the numbers getting closer to 128 if you are making the right changes, in the right area.
I understand what he is saying as far as getting the BLMs to 128. Low is rich and high is lean. But how do I get to that point? What do I open and compare to? I know it's a lot but I really want to understand. I have searched on here and on CK5. There is a ton of information to dig up and sometimes the links are outdated or do not exist anymore. And I'm not going anywhere so if you have the patience I have the time.
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