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View Full Version : 00" GMC Sierra 5.3L



ZL1Killa
August 22nd, 2009, 12:42 PM
I don't know what it is, but at about 4200-4400rpm or so, I get 5 degrees of knock retard no matter what.

Only thing I can guess is that torque reduction is kicking in or something. And the spark table is at 16 degrees, i'm getting 5 degrees KR, but the seen spark is 14 degrees....