Question about 2001 Hyundai Elantra

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2000 elantra rough idle after changing air filter

I was checking to see if my air filter needed changed. It appeard goog, so put things back together. I did not remove anything other than the cover. Now the car has an extremely rough idle and sounds like a plug or wire is bad. The check engine light blicks when idling and stay on when driving. The misfire goes away at higher speeds.Did I accidently unhook something??

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  • Hyundai Master
  • 76,164 Answers

You must have knocked off a vacuum hose from the engione, please check for this.

Posted on Apr 29, 2013

Testimonial: "Will do... Not much of a mechanic..Is this easy to find??"

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Posted on Jan 02, 2017

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maklean
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SOURCE: Misfire on cylinder 1 and 3

Do you observe abnormal idle speed? It may be just an indicator fault; not a really engine firing problem.
Sign up free at link http://ww.hmaservice.com/
You will find a lot of technical information for your model.

Posted on May 20, 2008

ghost4548
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SOURCE: what does the check engine code p1520 -

P1520 Generator FR Terminal Malfunction Harness and connector
This is the definition of P1520

Posted on Jul 04, 2009

  • 1 Answer

SOURCE: 2001 Elantra stall, loss of power. Driving at

I am having the exact same problem with my 2001 Hyundai Elantra. I was told that the engine code that comes up when the sensor is on is called "Absolute Pressure In The Manifold". I was told by a "Hyundai Specialist" that when that code comes up it usually means that the seal on the manifold is Fuct. When my mechanic checked that out for me he had noticed that my manifold had 4 cracks in it(can varify cause he showed me). He replaced the manifold and gasket. The car ran fine for about 2-3 days and since then the problem has since come back and my check engine light will no longer go on/off it only stays on. Because of the check engine light always staying on I have noticed that on many occasions my car will hiccup many times in a row. The only way to stop the hiccup I have noticed is to take my foot right of the gas for approx. 2-3 sec then car will continue without hiccup(till it happends all over again). All in all I have been having this problem now for approx. 1 year and if there is somehow someway it could be repaired I would appretiate it.

Posted on Nov 06, 2009

  • 1 Answer

SOURCE: 2001 hyundai elantra idling high

weeeeiiirrdddd. i have a 2001 hyundia elentra gls, and my third cylinder is misfiring as well. my car also revs constantly on idle and in between shifting. it will flutter between 2-3000 or it will just stay at 5000. i replaced my plugs and wires to no fix with my cylinder. autozone also told me that it sounds like my throttle position sensor needs replaced, but every part they try to sell me will not fit and they swear up and down this is the right part...

Posted on Nov 30, 2009

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Runs rough dies


change the fuel filter and check the fuel pressure

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2001 hyundai elantra running rough no power


Have you checked the air filter and filter box for a blockage ?
Low fuel pressure would also be a possible cause.

Jul 27, 2012 | 2000 Hyundai Elantra

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2007 chevy uplander running real rough, what could it be?


Vacuum Hoses
  • A loose or broken vacuum hose causes rough idling, and is the easiest repair of all. This is a very common problem since hoses wear out over time. Look in your engine compartment, and examine the hoses carefully for any signs of abrasion, breaking or loosening. Replace any damaged or broken sections of hose, available at most auto parts stores, and your rough idling will more than likely disappear.
Clogged Filters
  • Clogged filters are another common cause of rough idling. Inspect your air filter. If dirty, replace it. Also, a clogged fuel filter causes rough idling. It's hard to tell if a fuel filter is clogged or not, so a good rule of thumb is to change it at every general tune-up.

Electrical Components
  • Bad spark plugs, bad spark plug wires and a bad distributor cap are other common causes of rough idling. If it has been a while since you changed these components, do so. Most auto service centers can do this for you if you need technical expertise.
Timing Belt
  • A timing belt jumping a tooth is also a cause of rough idling. This throws off cam timing, setting in motion a series of events that prevent your engine from achieving proper timing. This is a more in-depth repair and, if needed, should be referred to a qualified auto mechanic.

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Why does my 2000 ranger have a rough idle?


Thanks for choosing FixYa and welcome to the site. There are a few different things that can cause this rough idle to occur. Check your vacuum hoses for leaks. You could have a clogged air filter or fuel filter. If you haven't had a tune up in a long time, try to get it done. Change your spark plugs/coils, wires, distributor cap, coil pack. Check for any loose hoses or wires on the engine also. You might want to check your pcv valve as well. Anyone of these can cause this to happen so check then all out.

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Car will not rev up but idles fine It bog out as u depress the gas pedal. the codes are vss and maf low input I replaced the maf sensor but no change fuel filter is good fuel pump is working not sure what...


you need a scan put on it to check the values of the maf or vss also scan out maf volts at idle 0.7-1.1 and at 3000rpm 1.3-2.0 if out of spec check for 5v at main in if not 5 check ecu.also check air filter is dirty.

Jul 13, 2010 | 2000 Hyundai Elantra

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2001 Elantra. I have had a tune up and replaced a flexpipe, also used carb cleaner in the gas tank, but still experience a rough idle and check engine light is on. It would go off for the better part of...


I would try replacing the fuel injector ,now the mechanical code,could be a valve spring, lifter ,or valve problem,but try the injector first.

Jun 10, 2010 | 2001 Hyundai Elantra

1 Answer

Recently I had my 2000 gmc 2500 6.0 liter truck start running rough. I changed the spark plugs, checked the coil packs and replaced the fuel pumpand fuel filter. Still no change....Any suggestions?


ROUGH IDLING CAN BE CAUSE BY MANY THINGS.I AM LOOKING AT LEAKING VACUUM HOSES OR INTAKE MANIFOLD GASKET LEAK.DIRTY FUEL INJECTORS AND WORN ENGINE VALVES WILL CAUSE ROUGH IDLING.ALSO LOW IDLE SPEED CAUSE ENGINE TO RUN ROUGH.

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Running rough


If your car is running rough and it's fuel injected (which yours is). Follow the air intake (black plastic box - housing the air filter that has tubing that goes to the motor) until it reaches the Throttle body (rounded metal air intake at the end of the plastic tube - has one large flap inside). You will want to remove the hose clamp and thoroughly clean the throttle body and the AIC (air idle control valve - small canister attached to the throttle body). Use off-the-shelf cleaner from any automotive store. This takes about 30mins to 1hr depending on your skill level. This will result in a cleaner smother idle and smoother performance. This is a common issue in today's cars. I have to do this once a yr to keep my modified car running happy.

Take a look at the later parts of this article for pictures to give you an idea:

http://forums.nicoclub.com/zerothread/319146

Good Luck

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Did you try changing the air breather for the motor?You need three things inorder for the engine to run well. Air,fuel,and spark.since you had a tune up and fuel flushed.I can only think of two things.First I never heard of flushing a fuel filter,you change it ( not flush it ) change your fuel filter,eliminate the guess work.And change your breather.

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1 Answer

Ilde rough


Check your idle air valve, maybe your air filter needs to be changed. EGR valve may need to be checked at as well.

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