Quick, when on I will see KR almost any and all rpm and any throttle % over Maybe 20%. It does this with 93 octane and 2 bottles of booster on flat ground and in 20* weather. We tried locking the timing in at 10* and still saw KR as soon as I started taking off. I know converter boots are tight, haven't been installed over a month. Headers touch nothing, no heat sheilding left on exhaust. I though my tip might have been touching my hitch so I insulated it with rubber. No difference. I've never heard this truck make any pinging. I know what it sounds like for sure. But the exhaust is so loud I don't know if I would hear it if it did.
99 silverado 2500 4x4 ec lb, lq4 with 243 heads, pace setter long tubes, true duals with x pipe and bullet mufflers, comp 222 224 112 cam, 8.1 truck injectors, 4l80e with 2800 stall, 373 gears, 285 75 16 tires, efi live tune in progress, 350rwhp 360tq, 11.8 average mpg mixed driving
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