I still have identical symptoms on my '06.. right side runs great.. left side spits, farts and pops. also an occasional weird higher pitched popping sound from carb or vicinity.
Last night I..
checked coils.. good 1/2 inch spark string between each wire lead and coil.
Switched coil wires (right to left/left to right).. no engine start...
switched spark plugs (both clean).. no change.
What should I check next? Could it just be a bad plug wire?