Anybody the reason or cause that when i start my 01 Explorer , the engine revs real high and now i'm starting to hear the engine make some noise since the oil hasn't circulated, not sure if it's a knock or maybe from the valves....


Asked by Mar 24, 2013 at 01:20 PM about the 2001 Ford Explorer Sport 4WD

Question type: Maintenance & Repair

8 Answers

A high rev often means a vacuum leak, air is getting in from sources it should not. If it has a vacuum brake booster, that is a large line, PCV system. Even intake manifold gasket. Or, there are various sensors that could have gone kaput

1 out of 1 people think this is helpful.

dave,, would any of the problems you describe leave a " code " ?

Yes. I had to run off..I wasn't finished..sorry 'bout that. But yes, if your EGR, PCV, MAF and all the other acronyms that exist, (almost as bad as the military) your OBD will show them. Sometimes they are vague, sometimes very specific.

Best Answer

Even though no " Engine light " coming on ? Very frustrating, I've taken care of this vehicle since day one, It has 170,000 on it and still runs brand new, now I cringe every time i go to start it....

1 out of 1 people think this is helpful.

That is curious that with the problems you describe that the CEL didn't come on. Some cars, yours I am not sure, it will come on triggered by mileage alone to remind you to have it serviced. I wish I could do better, be more help, but as you can imagine it's very difficult to diagnose these things not being at the car.


Thanks Dave,, Gave me starting point..... Greg

You are quite welcome...for nothing I feel like. I really do feel frustrated myself on this Greg.


Ehhh,, no problem... I appreciate it.... I'll look you up and let you know how i make out with this... Thanks again !

Your Answer

Add photo

Related Questions

  • Car will not idle when cold 4 answers

    2001 Explorer Sport, will not idle when the outdoor temp. starts getting colder. Anything below 45 it will not idle at all until it warms up. I have to unplug the MAF sensor to get it to run untill it...

    2001 Ford Explorer Sport 4WD


    Maintenance & Repair

  • Problems with ac holding charge on 2002 Ford Explorer sport 4.0 3 answers

    I have been working on my wife's 2002 Ford Explorer sport 4.0 liter and got it running nice and smooth again . Last thing to do was add a little refrigerant for the summer as we do every year as i...

    2002 Ford Explorer Sport 2WD


    Maintenance & Repair

  • why does my 98 ford explorer make a humming noise and not want to idle when it is hot but not overheated 1 answer

    Ford Explorer Sport


    Maintenance & Repair

  • Hard to start? 1 answer

    I just bought a 2003 Ford Explorer Sport XLT 4.0, it was having trouble starting and burning through gas. Realized the air filter was incredibly dirty, to the point I assume the previous owner nev...

    2003 Ford Explorer Sport XLT 4WD


    Maintenance & Repair

  • 2003 explorer V6 engine knock. 6 answers

    80000 miles. engine ran good 6 months ago. Upon startup a knock developed. Changed oil, no change. Replaced tensioners on both front and rear, old ones looked good, but replaced anyway. No change...

    2003 Ford Explorer


    Maintenance & Repair

Explorer Sport

Looking for a Used Explorer Sport in your area?

CarGurus has 325 nationwide Explorer Sport listings starting at $995.


Search Ford Explorer Sport Questions

Ford Explorer Sport Experts

#1 chassy
Reputation 330
#2 Tom Demyan
Tom Demyan
Reputation 200
#3 tennisshoes
Reputation 170
View All

Related Models For Sale

Used Ford Explorer"
1,371 Great Deals out of 71,753 listings starting at $300
Used Ford Explorer Sport Trac"
69 Great Deals out of 2,195 listings starting at $1,995
Used Jeep Grand Cherokee"
1,217 Great Deals out of 73,879 listings starting at $1,593
Used Ford F-150"
3,271 Great Deals out of 216,650 listings starting at $1,500
Used Chevrolet Tahoe"
1,076 Great Deals out of 36,075 listings starting at $1,700
Used Ford Escape"
1,722 Great Deals out of 93,978 listings starting at $788
Used Ford Expedition"
585 Great Deals out of 21,658 listings starting at $2,111
Used Toyota 4Runner"
366 Great Deals out of 18,996 listings starting at $2,200
Used Dodge Durango"
408 Great Deals out of 22,641 listings starting at $1,400
Used Toyota Highlander"
662 Great Deals out of 30,808 listings starting at $1,990
Used Nissan Pathfinder"
447 Great Deals out of 25,193 listings starting at $1,500
Used Acura MDX"
499 Great Deals out of 15,608 listings starting at $1,999