Greggor55
Newbie
any way you can tell me how you got the timing table to adjust? I adjusted the base spark and went for a ride to log the changes and when watching the spark graph I am 5 degrees short of what I changed on the main base spark table...any info would be appreciated! I have a 2000 express 3500 with the 454 and the original black box PCM btw.I tuned the black box in my 98, I promise it works.