tune up or catalyst converter

2003 MERCURY SABLE
100,000 MILES • 6 CYL • FWD • AUTOMATIC
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HMOORE
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  • 1 POST
my car is beginning to hesitate sometimes when going up a hill it feels like it is missing for a few seconds and smooths out
Apr 2, 2011 at 10:54 AM
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RASMATAZ
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  • 75,992 POSTS
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.
Jun 21, 2011 at 10:03 AM