Runs with lack of power only can go around 30 mph

Tiny
ROBERT2406
  • MEMBER
  • 1999 BUICK CENTURY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 85,000 MILES
My car is running slugish it is a buick century I just had the vaulve gaskes changed, could it be the cadilac converter?
Friday, February 4th, 2011 AT 1:08 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be caused by one of the following below

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it and keep testing.
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Friday, February 4th, 2011 AT 2:39 AM

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