1998 Ford Explorer • 6 cylinder 4WD Automatic • 239,000 miles

My 1998 ford explorer, idles rough, stumbles on accelleration, and lacks take off power, once it gets going it s fine, any ideas where to start? Already checked for vacume leaks, bad gas, not the problem
April 11, 2011.

Do you have a check engine light on and when was the last tune-up?

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.
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 and keep testing.

Apr 11, 2011.
Yes and I am going to run the codes, this just started all the sudden. Wondered if it was a common problem thanks !

Apr 11, 2011.