Hello

Pontiac Bonneville 97
3800 II NA
130k miles

Symptoms:

1)  Idles poor, always
2)  Somewhat consistent multiple misfiring issue, cruising speeds.
Occassionally at idle or on freeway.
3)  Once it's warm, Knock Retard from .5 to 9 degrees, irregardless of
speed.
EXCEPT, not under WOT

Replaced Fuel Filter/Sender/Pump, Switched injectors, new
plugs/wires/coils, MAP, TPS, cleaned w/GM engine cleaner thru intake,
ran oil cleaner, fuel cleaner

NO CODES

LT Fuel Trim Mostly Rich, ST Tends to be Rich

Any thoughts??