#4756, "RE: O2 wiring for megasquirt" In response to In response to 5
Originally posted by weebo66 what about the ignition wires do i tap those or do i cut them from the stock ecu completely. the map sensor can i just replace that with the 3 bar and wire that to the stock ecu and also tap for the megasquirt.
Please search and read. Everything you are asking has been covered many times.
Now to answer your question.. The coil is controlled by grounds. The stock ECU will provide +12v to the center wire through the ASD relay. You will need to cut the 2 grounds from the stock wiring and wire them to the megasquirt either through a 4g63 ignitor or internal BIP373s.
I'm not exactly sure what you're asking about the MAP sensor, but Megasquirt uses it's own MAP sensor independent from the stock sensor. No need to wire or tap anything.
