1998 Mercury Sable Engine sluggish and has high RPM

1998 MERCURY SABLE
13,000 MILES • 6 CYL • FWD • AUTOMATIC
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PFAFFLYJ
  • MEMBER
  • 2 POSTS
Hi, my car drives fine in town but when I get on the highway it is sluggish as far as accelerating and at 55 mph the RPM stays at 2000 even when I'm not pressing the gas. I just bought it 4 mo ago and they assured me everything was fine. Any ideas what I should do with it. It was not acting like this when I first got it. Thanks!
Jun 23, 2010 at 9:16 AM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking,fuel filter or defective fuel pump.
False air leakage.
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.
Jun 23, 2010 at 10:15 PM
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