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

Hi,
This is a cross-post from the microsquirt forum -- I thought others on this forum may have some insight into my issue.

My Setup is a 36-1 wheel with a VR sensor on my 1973 Porsche 914. Under cranking, I get 0 rpm and megatune indicates "not cranking."
The controller is a Microsquirt and I am using the built-in VB921s to drive 4 LS2 coils.

My settings are as follows:

Trigger Wheel Teeth = 36
Missing Teeth = 1
Skip Teeth = 18
Delay Teeth = 7 (based on where the sensor is relative to the missing tooth at TDC)
Dual Spark = single crank wheel

I am running Code version 2.90.

I also loaded up the .s19 file and program from http://www.microsquirt.info/tachref.htm and this was my output signal, with the arrow pointing to where the missing tooth passes the sensor. This tells me the wheel, sensor, and wiring are ok.
I'm struggling with how to proceed from here. Any ideas??
thanks!!
Rich

rwilner wrote:Hi,
This is a cross-post from the microsquirt forum -- I thought others on this forum may have some insight into my issue.

My Setup is a 36-1 wheel with a VR sensor on my 1973 Porsche 914. Under cranking, I get 0 rpm and megatune indicates "not cranking."
The controller is a Microsquirt and I am using the built-in VB921s to drive 4 LS2 coils.

That's not going to work... LS2 coils are logic level.

My settings are as follows:

Trigger Wheel Teeth = 36
Missing Teeth = 1
Skip Teeth = 18
Delay Teeth = 7 (based on where the sensor is relative to the missing tooth at TDC)
Dual Spark = single crank wheel

I am running Code version 2.90.

Looks OK to me. Maybe you need to trigger off the other edge?

Matt Cramer wrote:
Looks OK to me. Maybe you need to trigger off the other edge?

Matt, if you mean changing from rising edge to falling edge in base ignition options, I tried this and continue to read 0 rpm while cranking.

First make sure that you've adjusted the pot56 and pot52 on the MSII pcb correctly, then some VR sensors require resistors in line for correct signalling, at last might consider employing signal noise filter, thats how I solved my problem

lastermann wrote:First make sure that you've adjusted the pot56 and pot52 on the MSII pcb

rwilner wrote:This is a cross-post from the microsquirt forum --
The controller is a Microsquirt