1995 Mercury Station Wagon Missing at high RPM

1995 MERCURY SABLE STATION WAGON
161,500 MILES • 6 CYL • FWD • AUTOMATIC
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WILDMAN3756
  • MEMBER
  • 1 POST
The car starts fine, idles OK, but upon heavy acceleration it starts missing and stumbling. Did plugs, cap, rotor, wires, clean injectors, air filter,with very little difference. Exhaust does not seem clogged, on the acceleration you can feel the exhaust increasing and then the missing, so it does not appear to be a clogged or restricted exhaust
Mar 13, 2010 at 2:17 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 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
Mar 13, 2010 at 5:07 AM
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