The Cam Sync value on my classic FAST dashboard reads 0 when the engine is running.
I am using an old classic FAST harness adapter (not caspers) and it does not have a wire going to D3 on the FAST box. D3 is the Cam Rtn according to the ECU pinout. I do see a wire going into C3 which is the Cam+ input as labeled on the ECU pinout. So I am guessing this C3 (Cam+) doubles as the discrete input that is connected to the cam position sensor. Actually, the cam position sensor goes through the CCCI module first then to the ECU.
So I think I am not getting a reference from the distributor. But how did the discrete signal work without the CAM RTN wire installed. Surely it is getting a ground ref from somewhere.
I appreciate any help
I am using an old classic FAST harness adapter (not caspers) and it does not have a wire going to D3 on the FAST box. D3 is the Cam Rtn according to the ECU pinout. I do see a wire going into C3 which is the Cam+ input as labeled on the ECU pinout. So I am guessing this C3 (Cam+) doubles as the discrete input that is connected to the cam position sensor. Actually, the cam position sensor goes through the CCCI module first then to the ECU.
So I think I am not getting a reference from the distributor. But how did the discrete signal work without the CAM RTN wire installed. Surely it is getting a ground ref from somewhere.
I appreciate any help