1998 Mercury Sable Engine sluggish and has high RPM

Tiny
PFAFFLYJ
  • MEMBER
  • 1998 MERCURY SABLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 13,000 MILES
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!
Wednesday, June 23rd, 2010 AT 9:16 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 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.
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Wednesday, June 23rd, 2010 AT 10:15 PM

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