Megasquirt Trouble getting Tach output from MS3X to FC tach
#1
Trouble getting Tach output from MS3X to FC tach
In short, I am running LS2 Coils in COP in my FC. How do I get the tach signal? I've got the correct jumpers in place per the build manual, and I am 99% sure I have it wired correctly (it was hooked up to the same wire with my haltech e6x and worked).
I swear I read somewhere that a pull up resistor was needed or something, but I can't find it anywhere now. Do u need to do the relay mod it mentions?
Also, possibly related, I can't get the VSS to work either. It's hooked up via the writeup on here (speedo pulsed output into nitrous in). Could it be related, or am I chasing two issues?
Not in a position up upload my setup, but the tach is turned on and set to the correct output. VSS is set up per the writeup.
Edit: it's a MS3X with v3.0 pcb.
I swear I read somewhere that a pull up resistor was needed or something, but I can't find it anywhere now. Do u need to do the relay mod it mentions?
Also, possibly related, I can't get the VSS to work either. It's hooked up via the writeup on here (speedo pulsed output into nitrous in). Could it be related, or am I chasing two issues?
Not in a position up upload my setup, but the tach is turned on and set to the correct output. VSS is set up per the writeup.
Edit: it's a MS3X with v3.0 pcb.
Last edited by Sideways7; 06-05-17 at 10:48 PM.
#4
1308ccs of awesome
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#7
Well, that's easy - no wonder I didn't find any threads on it. I don't know why I thought that wouldn't work. Thank you!
Now I just have to figure out the VSS.... Unfortunately there's a decent chance I hooked up the wrong wire and I'm going to have to yank the dash again.
Now I just have to figure out the VSS.... Unfortunately there's a decent chance I hooked up the wrong wire and I'm going to have to yank the dash again.
Last edited by Sideways7; 06-07-17 at 10:47 PM.
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#10
Well, after all that I just had stuff wired wrong. There's two Y/L wires on the back of the harness for the gauge cluster - when I redid my wiring last year I connected the wrong one. It works now.
As for the VSS, I also connected into the wire right off the harness plug since I suspect something was cut along the way. Can't drive car until end of week when a part comes in, but I'm hopeful.
As for the VSS, I also connected into the wire right off the harness plug since I suspect something was cut along the way. Can't drive car until end of week when a part comes in, but I'm hopeful.