MSefi.com read only forum (Jan.15,2018)

After alot of fiddling with the VR pots, I finally got MS to read a signal. After another hour of tuning, I'm very frustrated with this. When cranking, it jumps from 0 to about 2k rpm, and then quickly drops down back to 0, and repeats this. Sometimes I can get it to read a solid 60rpm, however it is VERY incosistent, and sometimes jumps back to the old 2k-0 dance, or it just won't read a signal at all. MSQ and log included. Do I have to modify my VR circuit?

I read on some other forums that maybe a diode should be changed or a cap be removed... Might this help? I'd rather not do any more soldering but it looks like I may have no choice. I've tried adjusting the voltage trigger pot as far CCW while still getting a signal, and then adjusting hysterisis from there, is this the proper method? Also would I have this issue if my VR sensor wires were reversed? I don't think thats the case but it's possible.

I'm an MS newbie, car is a '01 Hyundai Tiburon, 60-2 wheel. From the hyundai service website, Basic ignition timing BTDC 10° ± 5°. I contacted an MS-I extra user who had an MS in his tib, he said he had trigger position A= 10, trigger position return = 18. Not sure if this is relavent to my scenario...

Anyways, if theres any other info I can provide let me know. Any help is appreciated.

Mat

Oops, here are the files. If it helps, I'm running MS-II extra 2.0.1.

A lot of 60-2 wheels work better with a 10K resistor on the VR sensor signal wire. Let me know if this helps.

I don't know what board you have but I accidentally put my 2 VR pots in backwards but I was able to just crank them opposite of what the manual suggested.
But then I found the signal to be erratic still until someone (probably Matt) told me to wire the VR wires backwards and use the inverse jumper on the board as that is the SOP. I did that and signal worked awesome. I have a 36-1 tooth wheel but these are my settings. Make sure your settings are right or it won't work. My VR sensor is 9 teeth before TDC.

Matt Cramer wrote:A lot of 60-2 wheels work better with a 10K resistor on the VR sensor signal wire. Let me know if this helps.

It sure fixed me up! 2 different wheels and 2 different sensors both with erratic or non-existant signals. Soldered the resistor inline and instant cure to my woes