Question about 2000 Ford Expedition

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I HAVE A 2000 EXPEDITION THAT IS IDELING ROUGH. IT IS SETTING CODES 171 AND 174. CAN YOU GIVE ME ANY IDEAS?

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  • Anonymous Jan 29, 2009

    I have a 2000 ford expedition starts up well but rides very ruff is this a bad cylinder coil

  • yadayada
    yadayada May 11, 2010

    is the check/service engine light on?

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  • 49 Answers

Low fuel psi running lean my be fuel pump or fuel filter

Posted on Jan 18, 2009

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The code are lean code for both banks. that with a rough idle is usually a vacuum leak.
i would inpect the pcv line, not the valve, but the line-hose assembly at the valve and at the rear of the intake manifold where it connects. with the engine running m,ove the hose around a bit and listen for a leak. .

Posted on Feb 11, 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

Rough ideling


too much air in the mixture adjust until idle is smooth

Mar 09, 2014 | 2000 Mazda MPV

1 Answer

Ford expexdition is running rough. IAC has been changed,runs better, but rough


Do you have codes present & cylinder misfires
common on fords?

Mar 11, 2013 | 2000 Ford Expedition

1 Answer

Rough idle, stalls, extremley rich


Maybe sensor is not for a bigger engine

Mar 05, 2013 | 2000 Ford Expedition

1 Answer

2000 ford expedition blinking check engine light


What Means-the check light?

You pretty much answered your own question

Get the codes,fix what you see & then work
on any misfires,if you still have codes

May 26, 2012 | 2000 Ford Expedition

1 Answer

My 2000 Ford Expedition XLT's check engine light


I'm probably not going to be able to give you a proper diagnosis without knowing which codes are setting the check engine light. There are about 300 problems that can set the light. Most common thing for your vehicle with not running bad is what they call the DPFE (differential pressure feedback) sensor. It's basically a vacuum/pressure monitor for the EGR system and they get stopped up or corrode as they have exhaust gases running through them and are made from aluminum or plastic. If you post code numbers (go to advance or autozone and they will read them for free) and I can give you a better idea of what the problem is.

Jun 19, 2011 | 2000 Ford Expedition

1 Answer

Check engine light stayson & car idles rough-any ideas? Installed new fuel filter. New fuel pump is over $300 . Fuel regulator seems fine!


There are many different things in todays engines that can cause a rough idle. First you need to know what codes the engine is throwing. My suggestion for this is to make use of Autozone's(or similar part stores) free engine diagnosis. They will give you a print off of the codes and it includes most likely causes and fixes.

Sep 23, 2010 | 2000 Chevrolet Impala

1 Answer

My 2000 ford expedition idles rough when the outside temp is 65 degrees or colder in the summer there is no problem i have already replaced the idle control valve did not help


so, when the engine is burning a rich mixture, it runs rough. Please take it to an Autozone and ask that they read the ODB messages.

It could be that your idle mixture is too lean. So a fuel system cleaner may be the fix... or a carb cleaner...

Something to get the system to give the engine more fuel on a cool morning.... that will make it better!!-Jim

Oct 22, 2009 | 2000 Ford Expedition

1 Answer

2000 Jeep GC engine reving.


IDLE CONTROL MOTOR. TRY TO CLEAN IT FIRST.REPLACE.

Jan 14, 2009 | 2000 Jeep Grand Cherokee

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