Optispark Rule Rule Update

[e vassar]

Originally Posted by Rob Petrie E395

Ok so when they say. “Crank/cam”. Are they counting the optical
sensor in the optispark as a crank or cam sensor? Because the earlier LT1”s do not have an actual crank trigger mounted in the timing chain cover. Like the later models do. They rely totally on the optispark to handle that. Not nitpicking. I own one and want to make sure I’m ok.

What year is your car?
If I'm not mistaken Gump told us previously that GM added crank sensor in 96 to smooth out minor mis-fires...I'm sure he'll be here soon to confirm or deny