1999 Mercury Sable SURGING

1999 MERCURY SABLE
103,000 MILES • 6 CYL • FWD • AUTOMATIC
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NYANDJIM
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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?
Sep 2, 2010 at 8:07 AM
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RASMATAZ
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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.
Sep 2, 2010 at 8:55 AM