Question about 2004 Ford Explorer

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Hello Need help on a 2004 Ford Explorer. Having problems with Ford explorer rough ideal & missing. Changed plugs & wiring. Used Gas treatment. Change fuel filter & air filter also.

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The computer should have coded a problem. If it did not code it is usually a vacuum or compression problem. With the motor running use a spray bottle of water and go along the seams of the intake manifold, Brake booster, EGR valve, and anything that has a vacuum line and spray them.

If you have a vacuum leak the water will be drawn in and the idle will be affected. That would be the gasket or part to replace. Sometimes on 4.6 SOHC engines the area under the Airhorn clogs the intake ports for the EGR. The groove under the gasket needs a cleaning.

Autozone and Oreillys will scan your Ford free. There may be a problem with the diagnostic system in your vehicle and at least you would be informed.

Posted on May 16, 2010

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Hello Need help on a 2004 Ford Explorer. Having problems with Ford explorer rough ideal & missing. Changed plugs & wiring. Used Gas treatment. Change fuel filter & air filter also.


You have an air leak at the intake. Spray a bit of starting fluid around the intake. The engine will respond when you hit the spot. Replace the gaskets as required.

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