One Of The Other Buick Boards Since 2004
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you need to start breaking that car down in quadrants, and examining everything you see.
make sure the drivers side motor mount is not cracked...put the car in drive, e brake firmly on, pop the hood, get out and slowly move the throttle lever to increase the rpm to about 1200 rpm or so...stop before the wheels try to turn...watch the engine and see if the engine suddenly jumps up on the ds.make sure the tranny lines are not rattlingOr, calibrate your ears to 6000 hz and screw your head into the knock sensor hole
so does living with women
Easiest way to test for false knock is: octane. Put lots in and stand on it... if the KR is still present you are on the hunt. If not, you need to do a tune-up of either your air, fuel or spark... or all three in some cases.I just had to pull 7 degrees of timing out of the tune in our TBSS due to KR at MBT (maximum brake torque) on 91 octane w/11:1 CR. It is only running 14-15* timing at peak torque now; it then progressively phases back to 21-22* at peak horsepower. I also turned off burst knock too... which is a calculated timing retard event based on load, but, that is a story for another day.
What is a tune up on a Regal other than new plugs?