i have a 99 pontiacv montana van with 3.4 v6 idles fine b ut when u press accelerator it bogs dowm
Aug 17, 2011 at 5:57 PM
99 pontiac montana bogging down
1999 PONTIAC MONTANA
PPOOLE3
- MEMBER
- 1 POST
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RASMATAZ
- ✓ASE Certified Mechanic
- 75,992 POSTS
Do you have a check engine light?
Go to this link for more information: https://www.2carpros.com/articles/engine-hesitates
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.
Go to this link for more information: https://www.2carpros.com/articles/engine-hesitates
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.
Aug 18, 2011 at 12:28 PM
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