Question about 1998 Ford Expedition

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1998 expedition all sensors,filters have been changed and it still idles rough what too do next???????????

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Check The Timing And Do A Compression Check, This Will Give You A Much Larger insight On The Problem. Also Make Sure All Your Spark Plugs Are Firing.

Otherwise You Can Take It In For A Tune Up And See If That Helps.

Posted on Jan 18, 2009

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2000 Expedition is idling badly and stalling.


Have you changed your fuel filter? When is the last time you changed your sparkplugs? Have you had any codes on the computer? Heres what I would do. First change your sparkplugs. This is a 4-6 hour job. You have to unbolt the cop(coil on plug assembly). After you change the plugs your truck will run rough. Drive it around the block then back to your house. It will take 3-5 restarts before your truck quits running rough. Reason for this is because your computer is trying to "relearn" the firing order. I have done this several times so i know what i am talking about. You can even look it up. Your 2000 expedition is a dang good truck with a great engine. After your computer relearns the firing order then the rough idle will be gone. Then I would take it out on the freeway and run it hard for 5-10 miles. If you experience a miss or two then that means you need a new cop(s). Get a code reader and it will tell you which cop is bad. Cops are expensive. I bought 6 new ones on ebay for $40. If you buy from autozone or ford dealer then you are looking at about 80-100 bucks a piece. Tell me if this helps. Ford makes a good truck and the expedition is a great truck. Mine is a 2000 expedition also. I have 248,000 miles on it and running strong with no burning oil. Good luck.

Apr 15, 2015 | 2000 Ford Expedition

1 Answer

What is causing 1998 4.6L expedition to hesitate on hills, rough idle


Are you sure the spark plug wires are on the correct spark plug? Recheck the firing order and spark plug wires. Additionally check timing on distrubutor

Jun 05, 2014 | 1998 Ford Expedition

1 Answer

Ugh


you have a mis get a complete tune up its worth a try even if it dont work atleast u.know ur maintnance is goo

Jul 30, 2013 | 1998 Ford Expedition

1 Answer

Runs rough dies


change the fuel filter and check the fuel pressure

May 25, 2013 | Ford Expedition Cars & Trucks

1 Answer

My 1998 expedition with the 5.4 triton runs rough at idle but clears up when driveing down road I know I have a manifold leak and the previous owner said it was a coil pack, however after I had advanced...


If you have a manifold leak that will cause a MASSIVE vacuum leak and make it run rough at idle only. Look at your short term fuel trims with a scanner, if they are way negative you have a vacuum leak. Fix the intake manifold leak and that will fix your problem.

Oct 06, 2011 | 1998 Ford Expedition

1 Answer

My 2004 Expedition is idles rough sometimes to the point that it dies. I have never had any problem at all with this vehicle. It has almost a 100,000 miles and all that I have done is change the oil and...


Sounds like the fuel injectors are dirty. run a bottles of STP or other fuel injector cleaner in the next two tanks of gas. Also if not done before change the fuel filter inline from the tank. Or maybe change the air filter, especially if you have been driving in an area that is very dusty.If the filter is clogged or full it will restrict the flow. These are some cheap fixes. If they done work then you can have the injectors cleaned at a shop but that is a bit more expensive. I hope this helps.

Dec 12, 2010 | 2004 Ford Expedition

1 Answer

My '04 ford expedition has been starting rough. Someone suggested we turn the key a few times before starting it and that worked great. This weekend I filled the truck with gas. The next morning the check...


if its a lean code p0171 p0174 then i would suggest looking for a vacuum leak or the air filter housing and air inlewt for leaks.
is this a 2v or a 3v engiune?

Jun 02, 2010 | 2004 Ford Expedition

1 Answer

Diagnostic Codes p0171 bank 1, and p0174 bank 2 (too lean)


Those codes are for the oxygen sensors, lean fuel mixture on both banks. Change them, problem with stalling and rough idle should go away.

Apr 23, 2009 | Ford Expedition Cars & Trucks

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