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

  • Tiny
  • Tera
  • 2002 Ford Windstar
  • 130,000 miles

The code reader says #2 cylinder misfiring. Van idols fine but under pressure it hesitates and stumbles

Sunday, September 4th, 2011 AT 11:09 PM

12 Answers

  • Tiny
  • rasmataz
  • Member

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

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Sunday, September 4th, 2011 AT 11:18 PM
  • Tiny
  • Tera
  • Member

The spark plugs are fine

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Sunday, September 4th, 2011 AT 11:24 PM
  • Tiny
  • Tera
  • Member

How do you clean the injector?

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Sunday, September 4th, 2011 AT 11:25 PM
  • Tiny
  • JDL
  • Expert
  • 16,236 posts

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.

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Sunday, September 4th, 2011 AT 11:25 PM
  • Tiny
  • JDL
  • Expert
  • 16,236 posts

I didn't see you Raz, have a good day.

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Sunday, September 4th, 2011 AT 11:28 PM
  • Tiny
  • Tera
  • Member

I just changed the spark plugs they are brand new and so are the wires

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Sunday, September 4th, 2011 AT 11:32 PM
  • Tiny
  • rasmataz
  • Member

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.

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Sunday, September 4th, 2011 AT 11:48 PM
  • Tiny
  • Tera
  • Member

How do you take it out and clean your injector

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Monday, September 5th, 2011 AT 12:10 AM
  • Tiny
  • rasmataz
  • Member

Your best shot is have the fuel system flush out-

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Monday, September 5th, 2011 AT 12:13 AM
  • Tiny
  • Tera
  • Member

Where do I go to have it flushed out?

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Monday, September 5th, 2011 AT 12:15 AM

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