MSefi.com read only forum (Jan.15,2018)

Lance, you were spot on. Power was the issue causing every problem. I went back across each circuit needing to have +5vdc and discovered that the voltage varied from +5.00vdc to +3.89vdc at U5, Pin 1 @ 40 socket, and everywhere else. I tested the +12vdc for the stepper circuit and it was sporadic ...

You know, I just read this ( http://www.msefi.com/viewtopic.php?f=30&t=40379#p238424 ) posting and it brought some new thoughts....

The day that I first couldn't connect, powering the controller, all 3 LEDs lit. However, since I was unable to connect with TunerStudio, I tried boot loading the ...

Close - but no cigar....

So I tried several work arounds last night, and the connectivity to TunerStudio did improve, but still does not display input data. I cranked the motor a couple times and it appears that the controller is functioning, at least with some parameters - fuel was being injected ...

Three attachment maximum. This is the second firmware mismatch screen shot.

Ok, after much studying and testing, here are my results...

(all of this testing was done with the same hardware and software configurations the previously had perfect connectivity uploading V2.905 firmware and adjusting parameters in TunerStudio. The system used was also restored to a date before ...

Ah, thank you!

Exactly the page I need to be studying!

I knew the code was larger in MS2 - never thought the "size" would be a factor with the communication, and it appropriately explains the freezing of the boot loader at different percentage completion.

I'll be hooking the meter up to the DB9 ...

Good morning to all! I figure my first post should have at least a little substance to it....

First, thank you to everyone! As a professional "lurker", this board has helped me many times in my MS project.

Back ground: 1984 Jeep Grand Wagoneer, 5.9L V8, carb to TBI, first squirt Jan 2011 on a V2.2 ...