Need help urgent!.... My trailing coil isnt firing because the microtech doest give signal on ign output #3 and #4

I also get errors on RPM and REF when doing a selftest.

This is a LT8 unit



What can make the microtech NOT firing? it does fire when i take the selftest but not when i try to start it.

 

Well I don't believe the trailings fire on start up just the lead plugs. Your error codes could be in the wiring, maybe the CAS. Mine would flash the codes sometimes if the car started for a few seconds and shut down.

 

Hmm my wiring is okey.