Tacho ouput for ETB tacho from LS2 coils?

[chris_xtreme]

Hi,

I have an ETB Tachomoeter which was fed from the coil's negative post on a rover v8.

I have switched over to using MS1 extra and 8x LS2 coils in wasted spark setup.

I have found http://www.msextra.com/doc/ms1extra/MS_ ... m#tachoout which suggests how to take the feed from each negative point via a few diodes and into the tacho.

The bit I don't know is which negative do I use from the LS2 coil, negative back to ECU, or negative back to block ?

http://www.megamanual.com/seq/ls2_coil_schematic.gif


thanks for any input!

Chris

[Matt Cramer]

You won't be able to trigger off the negative terminal on LS2 coils; it is not accessible.

[chris_xtreme]

thank you for setting me straight !!

I shall have to add a tacho out to the MS and create the high voltage output.

thanks for the help.