2802NR Posted April 2, 2006 Share Posted April 2, 2006 I'm not getting any tach signal on my guage display or my realtime display while cranking. I have searched around and it seems other people have had issues with a tach signal but no one posted a solution. I was wondering were else I could tap into for a tach signal. Right now i have it wired to the - side of the coil. I am running MS1 ver. 3 fuel only. Quote Link to comment Share on other sites More sharing options...
2802NR Posted April 2, 2006 Author Share Posted April 2, 2006 O.K. here is some more info on my setup, MS1 ver. 3 board wired for a Hall/opto signal. Everything worked fine with the stimulator plugged in. The rpm circut worked and the injector circut worked as well. I am using ver. 2.25 code with a relay board. All of my sensors are reading properly and my TPS is calibrated but still no signal. Last night I tried to tap into the tachometer circut after its resistor and had the same results, No signal while cranking. ANY suggestions are welcome, I am up for trying anything right now. Also, I read that installing an MSD unit and using its tach output works well. I am up for this too but I dont have the money right now. Thanks for any help, Jay. Quote Link to comment Share on other sites More sharing options...
Mack Posted April 11, 2006 Share Posted April 11, 2006 when you built it, or had yoru megasquirt built, did they build it to use the - side of the coil to fire off of? It has to be chosen as an option during the building process. its on THIS page, step 50, part B. Quote Link to comment Share on other sites More sharing options...
2802NR Posted April 11, 2006 Author Share Posted April 11, 2006 Yes, It was built for a Hall/optical/points signal. I ended up using the tach output off of the MSD for my tach signal. A few people said it wasn't nesisary and it probly wasn't but it was the only thing that would work for me. Quote Link to comment Share on other sites More sharing options...
Mack Posted April 11, 2006 Share Posted April 11, 2006 did you duilt it for triggering off of the negative side of the coil? hall/optical/points is just the input, you still have to build it to handle the negative side of the coil. thats seperate from all of the other options. Quote Link to comment Share on other sites More sharing options...
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