Tune up or catalyst converter

Tiny
HMOORE
  • MEMBER
  • 2003 MERCURY SABLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 100,000 MILES
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
Saturday, April 2nd, 2011 AT 10:54 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 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.
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Tuesday, June 21st, 2011 AT 10:03 AM

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