I've searched for the answer to this but couldn't find any relevant threads. I talked w/ MSD support and they lead me to believe this MSD rpm switch # 8950 won't work on our cars w/o some other M$D product. I asked if I could use the tach signal from the ECU and he warned that the signal may be a 5 volt square wave rather than the 12v square rave the switch is looking for. Anyone have one installed w/ no problems? Thanks.

 

sorry, I've gotta know this soon.
BAA
BAA
BA
BOOOOOINGGGG!!!

 

One last attempt, thanks for your patience.