i get multiple cylinder misfire code on 1996 Buick Riviera

checked all plugs, wires and coil packs they are fine, O2 sensors and mass air flow sensor are also new as well as fuel filter. now it is smiking bad from exhaust, and oil drips from mufflers, rough idle revs and stalls

by in Buffalo, NY on January 26, 2012
1 answer
ANSWER by on January 26, 2012
possible intake gasket leak, fuel pressure regulator, or ignition module