2001 Explorer Rough idle

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tmartin@plansee-tms.com - 21 Nov 2006 20:14 GMT

Changed plugs on 2001 Ford Explorer 5.0 95000 Mi. and air filter. Now
rough idle. Not before change. Then changed wires. Problem persists.
Lightly cleaned the Idle Control Valve and blew out the Air sensor
that is located just up-stream from the air filter. Problem is little
better but persists. At highway speed, runs great with full power.
Old plugs had 4 times the spec. gap. and experienced poor power and bad
gas economy with some difficulty starting. Now starts great but after
few minutes idle varies 500-800rpm. what's next? TWM

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Steve B. - 21 Nov 2006 22:55 GMT

>Changed plugs on 2001 Ford Explorer 5.0 95000 Mi. and air filter. Now
>rough idle. Not before change. Then changed wires. Problem persists.
[quoted text clipped - 4 lines]
>gas economy with some difficulty starting. Now starts great but after
>few minutes idle varies 500-800rpm. what's next? TWM

What kind of new plugs did you put in? Hopefully the same as the ones
you pulled out. Do you still have the old plugs? If so I would put
them back in and see if the problem is resolved. If so then you know
you have an issue with the new plugs.

Steve B.

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Don - 22 Nov 2006 02:04 GMT

If you put in Bosch plugs remove them and install Autolite or
Motorcraft. Also be advised that overly tight plug gaps cause a
misfire at low speeds only. See if there is any way you inadvertently
created a vacuum leak.

Don
www.donsautomotive.com

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