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I changed the intake on my 2000 expedition 5.4 it's running ruff and having trouble idling

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  • Cars & Trucks Master
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This is most likely a vacuum leak. Check all the hoses and connections. Make sure there are no splits on the ends of the hoses. If there are no bad hoses or missed connections, take wd40 and spray around the entire gasket area on the intake when the engine is running. If it starts to smooth out, you have found the leak.

Posted on May 15, 2014

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Did you change to an oiled gauze style filter also? If so sometimes they get hot and oily residue from the filter gets sucked in and can foul out sensors in throttle body tricking the computer into running the engine differently. Try taking off the filter and cleaning throttle body w/carb and choke cleaner. If it runs better you found your problem. Manly manufacturers are suggesting against the use of oiled gauze filters these days for this reason.

Posted on May 17, 2014

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That can often be a sign of a vacuum leak. Sometimes you can hear a leak by holding a 1/4 inch hose to your ear and running it all around the edge of the manifold while idling.

Another test is even better but you have to be careful of fire. Put solvent or regular paint thinner in an oil can and carefully squirt it around all sealing edges on the manifold while idling. If there is a vacuum leak it will suck in the solvent and the you will hear the idle speed change. Do this before the engine gets to hot to reduce the chance of fumes and a fire.

Posted on May 15, 2014

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SOURCE: 2000 mistubishi galant es idling rough seriously

Idling problems may be cause buy a number of issues.  You may check out the fast idle control valve and PCV if they would need cleaning.  You can check out the timing it may be advanced, that is why you feel that the car runs hard.

Posted on Jun 13, 2009

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SOURCE: 2000 nissan xterra knock senor and plug 5

Have you changed all the plugs to platinum and wires? My xterra was doing that and I changed all of them and now it runs great. Also, I changed the distribitor cap and rotor button.

Posted on Jul 20, 2009

turboKia
  • 55 Answers

SOURCE: i have 05 kia rio and its idling ruff and code is

How many miles, and have you had the fuel filter changed at all?

It could also be an O2 sensor. Try removing them. Tip should be a gray/tan color. If its green you have a blown head gasket.

Posted on Sep 12, 2009

Testimonial: "thanx 4 the help i change the fuel filter and car runs much better now but code remain the same but idleling is80% better now.God bless u. "

ameezle
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SOURCE: Code P0601 car idle and

Hi, basically that means that there is an interal fault in the Powertrain Control Module (PCM). There have been many reported PCM failures on Chrysler/Dodge products although it is possible for this to happen on any vehicle. In Dodge/Chrysler products, a P0601 trouble code means that a serial communication failed inside the computer at least 6 times. In most cases means the PCM has gone bad. This is possibly due to a short-circuit inside the PCM. Or, if you disconnect the wires/connector from the PCM while the battery is still connected, that may also cause this code. The most common fix is to replace and reprogram the PCM. In a few cases the dealer may be able to reflash the PCM and get it working. But more than likely the PCM will need to be replaced and reprogrammed (we recommend you take it to a dealership for this). The good news is it *may* be covered under your emmissions warranty. So even if you're out of bumper-to-bumper warranty or powertrain warranty, check your warranty guide or dealer to see if this is covered.

Posted on May 26, 2011

ZJLimited
  • 17970 Answers

SOURCE: 2000 ford focus w/ 2.0L on cold start-up runs ruff, idles badly until it warms up

Could be a problem with ECT (Engine Coolant Temperature) sensor or fuel injection system. Will need to test and check in order to discard.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Posted on Feb 16, 2012

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2 Answers

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.

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1 Answer

Have 2000 plymouth grand voyager cold strat runs ruff and has no codes


Possibly MAP sensor, cold air idle control in throttle body.
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Dies when comeing to stop iduling ruff


Is the check engine light on ? If so you should have the computer scanned for trouble codes first. The codes will point you in the direction to look for the problem.
You may have two different problems. Engine dies at a stop is usually a dirty throttle body or problem with the idle air control valve. Running rough could be a long list of things.

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My 5.4 is idling ruff. Runs real ruff in gear and


You have an overrich fuel condition.
That will make the Cat over heat and in time will ruin it.
Check for codes
Check for misfires
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Fix the engine driveablitiy issues, and hope converter is okey. Not likely if you caught it so late ,it is red hot.
A ten year old converter being clogged,would seem to me, to have been helped along ,by lack of necessary maintainance on the engine

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I have a 2000 ford expedition w/ 4.6 l, engine will start but will not idle.I have to press on gas pedal to keep engine from dying also seems to be surging at 500 rpm.there is no misfire and runs smoothely...


The TPS sensor (or Throttle Position Sensor) is bad locate it and replace, it is located where the rubber air intake hose meets the intake manual, look for a wireand plug, also to make sure it is this sensor bring the truck to an Auto Zone and have them read any stored trouble codes for free this should confirm the faulty TPS.

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1 Answer

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Sounds like you have a broken, leaky intake gasket. Spray some carb cleaner out of a spray can at the injector rail while the car is at idle and listen for any audible change in idle or in the way the car runs. Let me know what you find.

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