MS3-X no cam signal
 

I built a MS3X for my 91 miata with 1.8 swap.
car currently has 1.6 wiring/ecu/sensors with fm swap kit.

ms is built following the mega manual.
firmware loaded up no problem got Brains base map.
changed settings for batch fuel and spark.
and M3X board cam input

I wired it to use injection G for fan output like Franks write up states.
With brains base map the fan is on constant, if i try to change its settings to inj G it give a error for conflicting pin use.

Test outputs and everything works like it should.

Crank car, it shows cranking but no rpm, logging shows crank trigger on trigger logger but composite logger shows nothing.

cam signal is wired in to pin 32 on the X board

R56 is set to give 2.75v
R11 would max out at 2.34v on r17

I have double checked wiring a couple times... any ideas?

I would revisit your pots until you get signals in composite logger. I've never had an issue on a 90-95 install by simple doing 7 turns CW on R56 and 3 on R11.

what was the conflict you were getting on inj G? what else is using it? there is a list of in use input/outputs on the first tab.

What TB and TPS are you using?

TB and tps that are on the car now are stock 1.6 but it is unplugged. I have a stock 1.8 tb to bolt on and wire up so I have proper tps.

well you said this:

I wired it to use injection G for fan output like Franks write up states.
With brains base map the fan is on constant, if i try to change its settings to inj G it give a error for conflicting pin use.

I always use INJ G for fan, and that's how my basemap should have been setup (not sure what map you got).



and to confirm: you are seeing the crank signal in the composite, just not the cam?

The base map of yours may have been an older one, it had fan output on js10 if I switch it to injection G it errors.


In composite logger it doesn't show anything but if you go to trigger logger it shows a trigger.

i wouldnt use that map then.

Can you link me a better one then

um. check Frank's site.


but yeah, is cam in even on the ms3x on that map?

Links for base map were dead on his site lastnight.

And no but I changed that setting too.

Got a known good MSQ from a buddy of mine, Loaded it up and the car fired up.
still didnt have cam signal and had a random stumble probably from sync error, tweaking of r11 fixed that and now have nice steady crank and cam signal.

yeah. don't use random maps :)