Hello
Pontiac Bonneville 97
3800 II NA 130k milesSymptoms:
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 WOTReplaced 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??