I have reached my wits end! I'm wiring up a Digital RPM window switch for nitrous I will soon be installing. It calls for an RPM/Tach sigal wire from the coil or ecu. There are only 3 wire leading to the ignition coils! I have tried taping each of them and none of them make the window switch very happy, it just sits there like its recieving no signal at all. The damn electronic service manual does not have an ecu pin diagram! I know that brown is ground and yellow/black is the ignition relay positive, which leaves the mysery white wire that goes to "IGPL" and there is no diagram showing wtf IGPL is. Does anybody have a guess? At first I thought it HAD to be brown or yellow/black because they go through the white service loop on the front of the engine, which is used as a pickup for an inductive timing light, but they haven't worked either. If anyone can find an ecu pin diagram or can think of where a pickup wire might be, please help!

 

eh, nevermind, found it hidden in the depths of the ESM

[IMG]file:///F:/en/img/008.PNG[/img]Fuel and Emissions System Description - ECM/PCM Inputs and Outputs(M/T-Japan/Taiwan/China-Producted: Except KH)

Logical name, wrong section

 

lol, wtf... It says white IS the coil 1 pulse.

 

Dang it! looks like I have another expense...

Distributorless Ignition Tachometer Adapters

80 more dollars...

 

More research reveals I may be able to use the injector ground! Back to the garage.

 

Yes! just in case anyone ever searches for this, wire it to the injector ground. Cut open the black harness with the white loop zip tied to it, inside you will find a pure red wire (injector 2 or 3 I think) don't use the other 2 red wires with a stripe. Make sure to set your pulse at 0 (single cylinder engine) and you are set... Now I just need to set up a relay. I wonder if the fuel pressure switch will be as much a pain, I hope not!