Ahhhhh...gotcha!! It's starting to get cold here, so it will be awhile before it's gets warm again!! I'll see how it does this weekend pulling my boat.....I may have to take you up on the custom tune!! Thanks again!!

I have the u7194 on a 07 GMC Yukon 5.3 and be doin the 87 octane tune....I've done 4 logs with the parameters recommended in earlier posts......The first log said to "Adjust slope inj. UP by 5%" so I did it and put around 30 miles on it and ran another log....this log says "Adjust slope inj. UP by 2 ...

Good call...it was the UAC...gettin it dialed in now!! Thanks a bunch!!!!

I followed the directions to make a log and saved as a csv file....I can see the data in the dataviewer but get an unhandled exception error when opening it up in the dslogredux app. What other way can I figure out what parameters to change to make my Yukon 5.3 to quick spark knocking with I have ...