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View Full Version : 5.3l MPI Chevy spark knock


dirtywrench
07-02-2007, 10:53 PM
Need help with '03 chevy z71 5.3l v8. I have tried all six power curves and the only one that seems to give the best performance in #2. Does any one have a program that I can try. Thank you

msdtech4
07-11-2007, 10:57 AM
dirtywrench,

The timing curves are going to be something you have to play with. If chip two gives you the best performance I would recommend using that as a starting point and plot your own curves based off of Chip 2. Make sure once you program the unit that you do not plug in a chip as this will over ride the program you just put in there. Try moving that curve up or down and see how it performs from there.
Thanks,

MSD tech4