This isn't a third gen question but you guys are the most helpful people on the internet. The car is my 1994 z28 and while datalogging to solve another problem it showed I was getting 45+ degrees of timing which caused it to knock and pull a bunch of timing. Everything on it is stock except a catback and cai so the tune should be too. I'm using tunerpro rt incase anyone wants to see the log.

 

http://ls1tech.com/forums/pcm-diagno...t1-timing.html does this help?

 

Thank you! I searched for a thread like that forever and never worded right I guess.
I'll guess the cause of both of my problems is the maf because it runs bad in open loop to which I think relies on maf readings. II'll check for vacuum leaks too though.