The timing light just proved my 1989 330hp 454 with Thunderbolt IV (4) ignition is not advancing as the rpm's go up.
From what I've learned so far, my options are:
1) buy a new advance module - $320 from local dealer, week to get
2) hope to find a used module on ebay - $??? available ???
3) buy whole new system through Summitt - ~$250
4) hope my ***boat buddies can come through for me with a better option that the ones above!
So, am I right in thinking it's the advance module that has gone south? I've triple check all the wiring vs the manual and everything there is good. I have no idea how old the module is.
Advice, thoughts, opinions?