2001 Ford Taurus

Engine Performance problem
2001 Ford Taurus 6 cyl Front Wheel Drive Automatic 151623 miles

OK the kinda surges when you turn the air on.I`ve put new plug wires also check gap and installed new OEM plugs. Also replace the upper and lower intake gasket. Please give me any ideal you may have thanks for any help
July 22, 2010.

Possibilities: Inspect and test all the following listed 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.

Jul 23, 2010.
The car surges with the ac on I have gap and installed new OEM spark plugs and best set of wire I could buy.
Replace the upper and lower intake gaskets check fuel pressure it`s fine .
Doesn't have (No Check Engine Light) AC blows cold
Got a reply saying check ever sensor on the car but it does n`t have any codes (no check engine light on)

Jul 23, 2010.
Try cleaning out the idle air control valve and MAF sensor and test the throttle position sensor.

Jul 23, 2010.