Car problems

Tiny
JEFF69
  • MEMBER
  • 1995 PONTIAC BONNEVILLE
  • 6 CYL
  • FWD
  • AUTOMATIC
I have a 95 pontiac bonneville that runs but idles rough and kinda hesitates when I excelarate what could cause this
Friday, January 28th, 2011 AT 11:05 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light on?

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.
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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Thursday, March 17th, 2011 AT 3:07 AM

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