Hi All,
I am having trouble finding this answer, so I thought this would be the best place to ask the question and have the answer available to everyone, as it is a gap in the info available about this.
Edit: I've added the answers to these in the post.
Crank sensor data is direct from Mike at EFI Connection.
Vortec Dizzy info is from vortec 96-00 design pinout.
Question 1:
Using a Vortec distributor as the Cam Position Sensor, and looking down the connector at the pins, are these the correct wiring diagrams?
Answer:
C= 12v (Red 39 on 0411 PCM)
B=signal from dizzy (Blue 73 on 0411 PCM)
& A= Low Reference / ground from PCM? (Blue 61 on 0411 PCM)
Question 2:
For the EFI Connection supplied 24x crank sensor, is the below diagram correct?
Answer:
The above picture is just for visual purposes to determine the A,B,C pin allocations.
Cavity A must receive 12V.
Cavity B must be connected to ground.
Cavity C is the signal wire. You will test for signal voltage on this wire.
The EFI Connection supplied crank sensor is a 96+ Vortec style design, the pinout on the above image is for the LS1 style which has different pinouts for the same connector.
ADDED: Question 3:
How critical is the alignment of the vortec distributor working as the 1x cam sensor?
As I understand it, this 1x sensor is purely to let the PCM know whether the cylinder (determined by crank sensor position) is on compression or exhaust stroke.
If this is not properly aligned, would it cause the motor to not fire up at all?
And lastly, when the motor is at TDC on cylinder #1 on the compression stroke, and the distributor is fully seated, where should the markers in the distributor line up with?