Finally my 1st (water cooled) turbo build
Thread Starter
Elite Member
iTrader: (6)
Joined: Feb 2013
Posts: 3,398
Total Cats: 458
From: A cave in Va
Well poo, It didn't start. ms3x, I don't see any tach movement or fuel injector signal.
If I screwed up the wiring on the crank sensor, would that prevent me from getting injector signal?
If I screwed up the wiring on the crank sensor, would that prevent me from getting injector signal?
Last edited by ryansmoneypit; Oct 4, 2015 at 06:27 PM.
Thread Starter
Elite Member
iTrader: (6)
Joined: Feb 2013
Posts: 3,398
Total Cats: 458
From: A cave in Va
made a composite log, although I have no idea what I am looking at. How do you guys learn to use this thing? Where do I find instructions for this thing. the website explains how easy it is and what it can do, but I just dont get it. I have three unlabelled lines..Again, I am a computer illiterate fuckstick. Why do I look at other peoples logs and see much much more than an unlabeled squiggly line?
I re checked my wiring and don't see anything wrong. yet..
log two.csv
I re checked my wiring and don't see anything wrong. yet..
log two.csv
Last edited by ryansmoneypit; Oct 5, 2015 at 10:03 PM.
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA

Green is cam. 2 then 1. 2 then 1.
Blue should be a crank signal. There should be 4 crank teeth for every cam. It should look like this:

You are missing the crank signal.
There are forums for the megasquirt, actually two IIRC. Lots of people who have problems making the thing work post about their problems there for help. I read a lot there trying to find answers for my own problems with my MS2 years back, and learned a lot just reading the post from others who had various problems. After a while you see common issues and common solutions.
Grab a multimeter and check continuity from the connector that plugs into the crank sensor to the connector that plugs into the ECU. Also check each pin for continuity to ground in case one of them is shorted to ground. That's where I would start.
Thread Starter
Elite Member
iTrader: (6)
Joined: Feb 2013
Posts: 3,398
Total Cats: 458
From: A cave in Va
Wiring checks out. Ground is good, signal line is continuous as is the power. Neither ground out from either end. No crank signal.
CurrentTune.msq
In a desperate attempt I have changed a few setting from my last ms2 settings when it did run. Not sure if I need to be on wasted cop..I did not wire for sequential spark, but on ms2 the car ran on just wasted spark (not wasted cop) although I did have the ls coils . Not sure about the edge / going hi or low stuff either.
CurrentTune.msq
In a desperate attempt I have changed a few setting from my last ms2 settings when it did run. Not sure if I need to be on wasted cop..I did not wire for sequential spark, but on ms2 the car ran on just wasted spark (not wasted cop) although I did have the ls coils . Not sure about the edge / going hi or low stuff either.
Thread Starter
Elite Member
iTrader: (6)
Joined: Feb 2013
Posts: 3,398
Total Cats: 458
From: A cave in Va
looks like 1.3.4
Its crazy, of this entire build, this little black box was by far, the most intimidating part. I was reluctant to ditch the ms2 because I had such a rough time with it as well.
the fact that you cant open it makes me think that It is a firmware issue. Don't I just plug it in and say detect?
EDIT: maybe its this.... MS3 format 0435.16
Its crazy, of this entire build, this little black box was by far, the most intimidating part. I was reluctant to ditch the ms2 because I had such a rough time with it as well.
the fact that you cant open it makes me think that It is a firmware issue. Don't I just plug it in and say detect?
EDIT: maybe its this.... MS3 format 0435.16
Last edited by ryansmoneypit; Oct 6, 2015 at 09:39 PM.
I googled ms3 latest firmware and it looks like 1.4.0 is the latest release firmware. First step should be to upgrade that just in case your issue is firmware related. I'm on the one right before this (1.3.4 I think...) so I need to upgrade too.












