In Reply to: M5 running rich posted by Murray Cotter on March 23, 2001 at 13:36:05:
(posted from: (216.25.205.151))
one other possibility... the air flow meter. if the flap sticks, or the potentiometer contacts (sealed behind the black plastic cover) are dirty, you'll get seriously wacky performance, including belching black smoke, full rich running.