View Full Version : Problems With Digital6 On Factory Pcm

09-26-2003, 09:19 PM
I have a 1993 454SS truck, I have the following installed in conjunction with the factory harness and PCM running the TBI injection.

8366 pro billet distributor
8252 hvc coil
6520 digital 6 plus
Super conductor wires

I have this wired per the booklet instructions for a GM dual connector coil.

I am getting a code 42 and code 43 which looks up in my manual as.......

Code42, powertrain control module has detected a open or grounded electronic spark bypass circuit.

Code43, powertrain control module has detected an electronic spark control input signal voltage that is either too high or too low for too long a time period.

The truck surges at cruise.

I have the timing set too factory specs and am uncertain of the total timing with advance.


09-29-2003, 11:28 AM
If you have the module that was in the factory distributor, swap the module and clear the codes. Check to see if they come back and if the surge is eliminated. When swapping the module make sure that the wires inside the distributor that connect to the module go back the same way.