I am having issues with launch and flat foot. 1996 1.8 with a MS3x. I have it set up in tuner studio. my car has the upper and lower clutch switch and the neutral safety switch on the transmission for cruise control. With the neutral switch plugged in launch control works when its not in gear. With the neutral switch unplugged (both wires) nothing works anytime. When I jump the two wires on the neutral switch then launch control works all the time even without the clutch pushed in. This means it will engage while driving. Anyone have any ideas? Maybe my upper switch is bad? My car also have the flyin miata clutch override for starting.

 

If this happens the upper sensor isn't work fyi

 

I have an NB and I seem to recall the neutral switch as being an NA issue. Here's a write-up and video Greg Peters did: https://www.thecarpassionchannel.com/launch-control. Hope it helps