1985 Buick Century hesitation when accelerating

Tiny
JMCADAMS
  • MEMBER
  • 1985 BUICK CENTURY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 67,000 MILES
Why does my car have a bad hesitation when I accelerate.I have replaced the following; alternator, distributor rotor and cap, spark plugs and wires, electric fuel pump and fuel filter, rebuilt the carbuerator. The car runs well at 60 + and idles rough after the engine is warm.
Thursday, July 8th, 2010 AT 9:52 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Possibilities: Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position 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
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Thursday, July 8th, 2010 AT 10:20 PM

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