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

It has been a minute since anything has changed with my board, but I have some updates. I re-installed the MS code onto the daughtercard and now I have some very strange things going on. The tach signal jumps from 0 to 8000 and now all of my other inputs are non-responsive. The fuel pump LED also ...

So I completely replaced the optoisolator with a six pin socket and new optoisolator. Still missing the tach signal. Checked the back of the board, no stray blobs of solder, no messy flux. I've already scrubbed the back of the board with a toothbrush and acetone, twice.

Apologies for the late reply, I've been out on a field problem for the past week. I came in for a few hours to refit and I got away to run your tests.

I applied the 12V from a battery to TachSelect while the stim was powering the board. TSEL had 91mV. I then grounded pin 24 on the DB37 input and ...

Gentlemen,
This is my first post to the forum though I have read extensively for some time. I need your help with the following issue.

What I Have
1) MSII Processor w/V2.9200 code
2) V3.0 Board
3) V2.1 Stim
4) Running TunerStudio


I have arrived at the RPM signal testing portion of the MegaManual ...