NorthernTahoe
Newbie
Hi,
I was tuning my '99 Tahoe and noticed there's some knock retard at high load and high rpm.
I started with a tune with much advanced timing, and ended up retarding the timing at high rpm even compared to stock tune. It helped some, but it's still there.
A wot run regularily brings a couple of degrees knock retard when going trough second gear around 4400. Usually not in first gear. Some retard at lighter load too at same rpm, and occasionally some at other areas.
Have someone seen this? Could some kind of exhaust rattle or something like that cause it? Guess I'll just keep retarding the table and see, if it finally works...
I was tuning my '99 Tahoe and noticed there's some knock retard at high load and high rpm.
I started with a tune with much advanced timing, and ended up retarding the timing at high rpm even compared to stock tune. It helped some, but it's still there.
A wot run regularily brings a couple of degrees knock retard when going trough second gear around 4400. Usually not in first gear. Some retard at lighter load too at same rpm, and occasionally some at other areas.
Have someone seen this? Could some kind of exhaust rattle or something like that cause it? Guess I'll just keep retarding the table and see, if it finally works...
) I get KR only occasionally now at 1st. I had to go very near to stock settings at high rpms. My trans is working flawlessly (knocking the wood).
