1996 Mercury Sable Rough Idling - Engine hesitation

1996 MERCURY SABLE
16,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
JSPIKER
  • MEMBER
  • 1 POST
My Sable is idling rough, at about 600 rpm. When I accelerate there is ususually a long hesitation before acceleration. At highway speeds I think there is an intermittent miss. Rapid acceleration usually causes engine to downshift and slow before the engine starts to rev.

I have an 02 sensor code, but have had this for over a year, and this problem began about a week ago. No other codes.
Feb 28, 2010 at 1:48 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Inspect and test all the following listed below and get back with some testing results we start here

Oxygen sensors.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking 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.
Feb 28, 2010 at 2:01 PM
Advertisement