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High revvivg at start up on my 2002 ford f 150 4.6 engine

From start up it revs really high and takes off from start as if it was already at 60 clicks

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: A4 warm start up problem

It is very likely that you are having an air leak. Any uncontrolled air getting into the intake side can cause this problem. Audi is well known for vacuum problems. I was the southern technical specialist for Audi for 6 years. If you have a vacuum test pump you can do some testing yourself but to be honest there are so many little hoses on that engine that you most likely not get to them all. I would suggest you go to your mechanic and see if they can perform a smoke test on the system. Many shops have a tool that can inject smoke (like a smoke machine at the club) into the system and locate the leak rather fast then.

Posted on Nov 01, 2008

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SOURCE: 2001 FORD F150 ENGINE SURGES AND DIES AT IDLE

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

Posted on Apr 16, 2009

chrischronic
  • 235 Answers

SOURCE: ENGINE SURGES AT IDLE

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.

Posted on Apr 21, 2009

  • 1 Answer

SOURCE: spedometer and high rev problem : 2002 kia spectra

sounds like the electronic speedometer cable, look around the trans for any wiring that may have gotten burnt

Posted on May 07, 2009

  • 3 Answers

SOURCE: 96 f-150 idles really high

I just solved this problem on my truck after fighting with it for 2 yrs. Mine is the 5.0 though, check your PVC valve and replace if it is bad. After that Take off your IAC and spray down with carb or brake cleaner and scrape all the carbon build up out of it and work the spring inside. you gotta really clean it out though! After that if it's opening and closing easily put it back together and it should work! you might have to adjust the idle a bit to get it all the way. But after doing this my truck went from a 2000 rpm idle down to about a 700! I hope this helps you!!

Posted on Sep 28, 2009

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1 Answer

Od flashing; high rev at low speed; no dtc.


Bad Sleeves - Ford Servo Bore Transmission Fix Solution

www.fordservoboretransmissionfixsolution.com/blog/bad-sleeves
Original owner let it run low on fluid because of leak. ... The worn bores will cause slipping, hard shifts, and high revs between shifts from those gears. ..... Andy I bought a 02 mercury mountaineer v6 4.0 the the O/D flashes and service light is on ... Get on a flat surface at highway speeds and manually turn the OD of and on.

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Dec 05, 2015 | Cars & Trucks

1 Answer

Car engine idles really high then really low, why?


It can be issue with IAC( idle air control valve) causing the problem.


There are many other possibilities causing these idle issues. Engine idles rough.

There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----

Ford Expedition IAC valve replacing

http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html

Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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Stumbling and stalling at idle after engine rebuild?

http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

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1999 Ford F-150 Idles rough and quits when gas pedal is pressed less?

http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html

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Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

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Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

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Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

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Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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GMC Sonoma Stalls and idles low

http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html

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GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

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1996 Camry intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

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Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

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Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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High Idle Problem

http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

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High rpm in neutral? Inconsistant high RPM in neutral?

http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

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Vehicle stumbling at idle and shows code 54?

http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html

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Rough idle, staling and Erratic shifting?

http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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These details will help.

Thanks.

Feb 15, 2013 | 2003 Pontiac Grand Am

1 Answer

My 1986 Ford F-150 5.0 EFI runs good, but when I start it it revs to 1700 rpm untill I give it a little gas then it drops to normal rpm. How do I stop it from the high revs when started?


Does it rev high when started cold or hot? If it does it either hot or cold, check the throttle position sensor on throttle body. If that is not bad, then check the automatic choke sensor.

Jul 03, 2010 | 1986 Ford F150 SuperCab

1 Answer

2002 f150 lifter noise 4.6


possibly faulty...worn,get checked out, not really old enough to be noisy..oil not too thin or low,temp not too hot,either weather or engine temp too high(hot),engine hasnt got hot in the past,does it get plenty of revs ??? all could be causes maybe replace them ,not worn camshaft ..engine runs O.K?

Oct 29, 2009 | 2004 Ford F150

1 Answer

Spedometer and high rev problem : 2002 kia spectra


sounds like the electronic speedometer cable, look around the trans for any wiring that may have gotten burnt

May 07, 2009 | 2002 Kia Spectra

1 Answer

Cold days 94 f-150 high rpm start


probably is a emissions sensor problem, lots of these parts are plastic. check out the throttle cables, lub em wd40. there is a type of valve somewhere on top of engine, it may be cracked, pcv valve stuck. lots of possibilities, almost too much for solution online. something emmissions with an electronic sensor is acting up.

Feb 25, 2009 | Ford F-150 Cars & Trucks

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