I have a 1994 K1500, I built a new vortec head 350 and have been having issues with the tune since the engine swap. I'm using tunerpro rt, Ostrich 2.0 and aldu1. The issue I'm having is the datalog shows random 23037* spark advance, watching the display on tunerpro it shows maxed out on 50* at random times. I have installed new coil, new spark control module ac delco, another new coil, complete new dui distributor, upgraded from 6395 to 7427 PCM and still no change in weird SA glitch. I will be trying anything and everything this weekend to try and fix the glitch starting with changing the memcal. I'm looking for any advice in advance on what else could cause this so I can just go down the list and try everyting.
Thanks in advance
Jimmie
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