• Tiny
  • nyandjim
  • 1999 Mercury Sable

Engine Performance problem
1999 Mercury Sable 6 cyl Front Wheel Drive Automatic 103000 miles

When accelerating modestly, the engine often seems to falter momentarily, and then surges for a second, and then settles back to normal acceleration.

Did the 100k tune up at 98,000k and this problem is unchanged.

Is this the computer?

Thursday, September 2nd, 2010 AT 8:07 AM

1 Answer

  • Tiny
  • rasmataz
  • Member

Hi nyandjim, Welcome to 2carpros and TY for the donation

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.
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 it.

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Thursday, September 2nd, 2010 AT 8:55 AM

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