Question about 2003 Ford Expedition

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I just put oil in my 98 expo and spilled some on the side of the spark plugs. i took them out, cleaned and replaced. it idles rough. so i bought new plugs and wires and still rough idle. what do i do next?

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  • Ford Master
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Depending on how you pulled the plug leads off the plugs will result on wether or not you have damaged the leads. It is very easy to separate the wire end from the carbon track inside the lead and so they will misfire.. Suggest you get new plug leads and be careful on how you handle the leads when pulling them off the plugs.

Posted on Jul 29, 2013

  • marcel cole Jul 29, 2013

    ive been there before and made sure all was connected. but it idles rough and drives rough. bought new plugs and wires. should i buy new coil packs?

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Posted on Jan 02, 2017

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SOURCE: 2001 Ford Explorer idles rough when at a stop in

sounds like a vacuum intake leak..check a those little tubes for cracks and security. also check your transmission levels, this will sometimes cause a surging problem while driving..if all this checks good then it might be dirty or clogged injectors..purchase a can of Sea Foam from Autozone $10 pour in 1/2 can to half tank of gas and drive around for thirty minutes..highway driving preferred, and see if that will clean up the fuel system.Can i get some feedback, thanks

Posted on Apr 27, 2010

  • 113 Answers

SOURCE: rough idle

check ur coil pack for cracks my wifes cousin car done the same thing and the coil pack had a hair line crack in it

Posted on Jun 16, 2008

  • 1 Answer

SOURCE: 2002 Ford Focus - Idles

Vac elbow had small crack in it - replaced the elbow and the car runs great

Posted on Aug 13, 2008

  • 1 Answer

SOURCE: 2001 v6 escape rough idle when cold

To update my earlier repair on the 2001 6 cyl Escape: When cold, and when the ignition was turned over but no accelerator pressure given, the rough idle finally returned the P0303 code again when the check engine light came on indicating that it wasn't caused by the plugs or the coil. FYI, I had replaced the intake manifold gaskets during the original repair and just prior to that I had replaced the fuel filter which was very dirty (I cut it open to see).

The repair manual referred to fuel injectors as a possible problem. I have run three tanks of fuel using different injector cleaning products and am very pleased with the results. Cold starts are much smoother and I am unable to coax out the P0303 code or any other code.

My opinion, change the fuel filter, use a fuel injector cleaner for a couple of tanks, change the plugs if the problem still exists. The coils were not the problem on my vehicle.

Posted on Mar 09, 2009

MauiRentaCar
  • 288 Answers

SOURCE: u i have a 97 ford escort that idles rough so i

Often, on the Escorts of this vintage, rough idle can be due to a leak in the vacuum system. With the engine running, listen closely for any tell-tale hissing sounds coming from any of the vacuum hoses. Check that they are all securely in place and the end-clamps are all tight. Also check that the PCV valve and the hose connecting it to the manifold are securely in place. Another possibility is the Idle Air Control (IAC) valve. If it is clogged or sticking, it can cause rough idle. Refer to a service manual to diagnose the IAC valve. Other things to check: make sure that the air intake is unobstructed and clean. You might consider cleaning the manifold and throttle body. Check the air filter and replace if necessary. Let me know if you have any other questions.

Posted on Apr 02, 2010

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