That was my first thought and thats how I built my harness. It didnt work. i was getting a code for the Cam Position Sensor. So I tried cutting that (gry/red) wire and sending full 12 volts into the CMP. Didnt work. I tried grounding that wire, also didnt work.
The gry/red is your ref voltage (approx 5 volt) and comes from pin 46 on the '95 computer, Im not sure what pin it is on the comp youre using. It goes to the oct adjust shorting bar, coolant temp, intake air temp, tps, dpfe, and some other stuff I dont recall off the top of my head.
The 3 wire CMP has a signal return (dk blue/org)
+12volt....Red
Ground....Black
What I found is that the different types of CMPs sent different signals to the computer. No matter what voltage was sent into the SOHC CMP, it wouldnt send the signal the OHV computer is looking for. BUT, the engine runs without it. So I just left it. I have a check engine. I have 3 solutions for it:
#1) Machine a housing to fit the 132mm (the earlier 123mm shaft is too short) cam sync shaft into the SOHC block. It shouldnt be too hard, I have a lathe at home and a machine shop at work that I can use.
#2) Pull the SOHC out and swap in a Cummins 4BT. Never see a check engine light again.
#3) Drive it without a working CMP.
Im going with option #3 until I finish with option #2. I may still try to make the Can sync housing, This engine may wind up in my 94 Limited.
The 3 wire sensor down in the valley? The knock sensor is the only one I can think of. Its under the intake and has 2 wires. If thats what you mean, I threw it away. Its not used on the OHV. You will have the run at least 89 octane or better, the engine WILL ping on regular. If it does ping, you can pull the octane adjust shorting bar (Not sure if the harness and computer youre using use one, my 95 does.). It will pull a little timing out and allow you to burn through a tank of lower octane fuel. You wont have as much power, but it will stop detonation until you can fill up with better fuel.
