1989 Pontiac Grand Prix missing when driving

1989 PONTIAC GRAND PRIX
230,000 MILES • 6 CYL • FWD • AUTOMATIC
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14RIC
  • MEMBER
  • 1 POST
cuts out/missing when driveing
Dec 4, 2008 at 1:54 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
When was the last tune-up ?

Misfiring may be due to a vacuum leak, but it can also be caused by dirty fuel injectors, a weak fuel pump (low fuel pressure) or a faulty fuel pressure regulator. It can also be caused my ignition misfire due to worn or fouled spark plugs, bad spark plug wires, or weak ignition coil.
Dec 4, 2008 at 2:03 PM
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