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

thanks Lance

hi

I was wondering what does a 7 pin HEI module have for signal that comes from the pin R? is´t + or - ?

m

check the clock on " realtime display" on megatune! do you have constant on? otherwise seems to be power problem.

m

m,

Unless the 7/8-pin HEI module sees 5V of the B pin, it uses the trigger directly.

So yes, you need to supply 5V to the B pin. If you are using trigger rise, you can supply 5V at all times, and not use a relay (you can also use one of the spare ports to trigger the 5V to the B pin).

So there ...

WOT,

The original poster was asking about not using the bypass relay (or another bypass signal). If you leave 5 Volts on the bypass pin at all times, then MS-II has control over the timing, even during cranking. By having it send a 'trigger return' output to the module, you get essentially the ...