88IROC_Z

hi guys,
Been a long while since I have been on here
Had a couple questions that I could not find the answer to with search tool- maybe just typing something wrong

1st issue:
I have an OBD1 PCM in a 94z(auto) that was tuned by PCM for less about 6yrs ago that I would like to do some additional tuning on.
I have a moates cable, win flash, and tunerpro RT (familiar with use of these just not on an LT1)

Is the PCM locked in any way that will interfere with using what I have?
Can I read and save the PCM4less tune to have incase I mess something up and need to go back to it?

Issue 2:
I have a MSD opti installed that seems too far advanced and I believe it is due to MSD timing adjustment on the opti itself- is there a way I can lock the timing and put a mark on balancer to be able to re-ZERO the opti???

Thanks in advance for any and all help
Daniel.

DelSoto

Alvin (@pcm4less) states that he does not lock his tunes. So the answer to your first issue is yes.

From what I have understood, the MSD opti is at factory spec at 2 turns out on the adjustment screw. I would assume you could simply turn the screw all the way in and then turn out 2 turns to accomplish what you are after.

88IROC_Z

Great
Thank you @delsoto
I will give that a shot tomorrow after work.