im trying to use a 96+ crankshaft sensor to trigger my megasquirt ecu, but i dont know which wire is which, i know theres a signal, ground, and +12V...can anyone tell me which is which?

 

ttt anybody?

 

yellow= signal
pink/black= ref. low
pink= ignition feed

 

i dont have the stock pigtail for it, ive modified an o2 pigtail to work, but the colors are different...can you tell me which wire is where on the sensor?

 

you using the cranksensor on the bottem of front cover, or the optical 4x sensor in the opti spark distributor.

i think you would have better luck using the 4x optical sensor, it is alot more accurate then the crank sensor.

the crank sensors on the 96+ engines are for emmissions for the most part. by using cam/crank sensors the pcm can detect which cylinders missfire, but the ECU still uses the optical signals from the distributor for ignition timing control.

 

in reply to my last message, using the low resolution signal isn't that easy. it has an odd pattern to it i never realized.

check out this website about it, also, search the www.msefi.com site for lt1 and optical, there are a few writeups about using the low resolution signal.

good luck

http://www.gmhightechperformance.com...htp_optispark/

 

i appreciate your input, but there is no code yet for the megasquirt to accept the different length slots in the opti's low res portion of the wheel, this is why im trying to use the crank sensor, which btw i figured the wiring out but i cannot get the megasquirt to accept its signal...