'99 Pontiac Grand Prix Problem

Tiny
WILBUR1992
  • MEMBER
  • 1999 PONTIAC GRAND PRIX
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
Ok, I have a '99 Pontiac Grand Prix. Everytime I go up a steep hill, my car feels likes it "jolting", struggling to gain speed. What could the problem be?
Thursday, February 10th, 2011 AT 8:56 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light on? When was the last tune-up?

Lack of acceleration, chugging, hesitating********, bogging, misfiring etc. 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 10th, 2011 AT 5:06 AM

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