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2001 Ford Explorer surges at idle only sometimes stalling

My daughters Explorer runs reakky well no misses but surges at idle to the point of stalling on occasion. I changed all plugs,wires filters and pcv valve. Any ideas

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  • d1rasta Dec 08, 2008

    2000 ford exploxer surging when idle and not when driving especially starting out. Also o/d light starting to blink. Just starting to put feul injector cleaner aldo had them replaced last summer... having oxgyen sensor problem I believe. would this cause the same problem??

  • Anonymous Mar 30, 2009

    Try the EGR, Emmission Gas Recycler, or cleaning out the intake area.

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6 Suggested Answers

  • 9 Answers

SOURCE: Rough Ideal on 2004 Ford Explorer

Open hood and listen for vacuum leak sound. pcv hose is most likley cause.

Posted on Sep 04, 2008

SOURCE: pcv valve

I have a 98 4L SOHC . The valve seems to be behind the intake manifold. The emissions diagram shows 2 hoses going to it. Local dealership swears Part #EV225 is correct. You would not believe how much of the internet is devoted to this situation

Posted on Sep 23, 2008

  • 92 Answers

SOURCE: 1998 Ford Explorer sport 4.0L 4x2 PCV Valve Location

the pcv is located on the rear(firewall) of the drivers side valve cover.turn counterclockwise and pull to remove be careful there are 2 small tabs inside the pcv hole in the valve cover(can feel with small finger) this is to hold valve in place so it wont leak.if you have a oil leak at the pcv a quick fix is to put a small amount of silicone around the pcv o-ring and install.wait hours for silicone to set up.

Posted on Oct 21, 2008

michigan man
  • 3533 Answers

SOURCE: pcv valve

AutoZone can help with diagrams

Posted on Jan 18, 2009

  • 1 Answer

SOURCE: replaced the idle air control valve on my 2001 infiniti I 30 because it would not idle,now it idle to high and surges did I do something wrong?

hey try the idle control sensor not the idle air control valve. It should be by your throttle body

Posted on Mar 10, 2009

motor1258
  • 6674 Answers

SOURCE: MY 98 FORD WINDSTAR STALLS WHEN I IDLE OR COMING

I'd be looking at removing IAC valve, and cleaning it out with throttle body spray cleaner, and checking mounting gasket as well. Usually some success with cleaning it & spray ports it came out of, but if not you may need to replace it.

Posted on Oct 12, 2009

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1993 Ford explorer.Began idling rough and surging


The test connector is in a holder at the back bottom of the fuse/relay box on the passenger side fender well. There are 2 parts to it: the main connector and the ground, you will need both connected to the diagnostic tool to get the codes.
Check your IAC (Idle Air Control) valve on the side of the intake. These get carbon fouled and tend to stick causing high rpm for extended times. Also the EGR valve should be checked (under the intake) as it will cause rough idle or stalling near idle.

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2001 Ford Explorer idles rough when at a stop in drive. Runs fine and idles in park fine. Surges also. Has new spark plugs and wires. Any suggestions of what may be causing the problem?


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

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Check the pcv hose for leaks at the intake manifold. Common problem.

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Engine won't keep idle speed intermittently


check the idle control valve they sometimes get dirty

Sep 29, 2009 | 2001 Ford Explorer

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with the engine running lift hood and lisen for a vacum leak and check all your vacum lines. if no vacum leak can be found then replace the idle air control valve.

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Check all of your vacume lines. If it isn't a vacume line it is most likely the O2 sensor.

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Truck loops during idle and eventually stalls.


Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Apr 07, 2009 | 2001 Ford Explorer Sport

1 Answer

1989 EscortTac shows surges in RPM, but engine does not race up.


How many miles, has the timing belt ever been changed? (60,000-70,000 miles) when the belt gets near or over it's recommended change mileage it will get loose and cause the engine to run like it has a miss, mostly when cold, also u may need to do the following procedure, Escorts need this more than most other Ford cars
Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Jan 16, 2009 | 1989 Ford Escort

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