Mechanics

WHY WOULD MY VAN KEEP MISFIRING AFTER REPLACING PLUGS AND WIRES?

2002 Ford Windstar • 130,000 miles

The code reader says #2 cylinder misfiring. Van idols fine but under pressure it hesitates and stumbles
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Tera
September 4, 2011.



Check the sparkplug, compression and injector for no.2 cylinder

Rasmataz
Sep 4, 2011.
The spark plugs are fine

Tiny
Tera
Sep 4, 2011.
How do you clean the injector?

Tiny
Tera
Sep 4, 2011.
Did you visually check for spark at the spark plug in question? You can use a digital multimeter, one lead touches the spark plug wire, don't take the wire loose or penetrate the insulation, the other leads goes to ground, metal part of engine. Engine running, This is an inductive reading, may show around 1/2 volt, compare to other plug wires. This test isn't conclusive, but, is non-invasive. An example, if the reading on 5 plug wires is around 1/2 volt and the other shows zero volt, I know where to start.

JDL
Sep 4, 2011.
I didn't see you Raz, have a good day.

JDL
Sep 4, 2011.
I just changed the spark plugs they are brand new and so are the wires

Tiny
Tera
Sep 4, 2011.
http://www.2carpros.com/articles/engine-hesitates

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.

Rasmataz
Sep 4, 2011.
How do you take it out and clean your injector

Tiny
Tera
Sep 5, 2011.
Your best shot is have the fuel system flush out-

Rasmataz
Sep 5, 2011.
Where do I go to have it flushed out?

Tiny
Tera
Sep 5, 2011.
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