Question about Hyundai Motor 2002 Elantra

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I have a 2002 Hyundai Elantra. The check engine light came on and read a code of 2nd cylinder misfire. We have replaced wires,spark plugs,coil, and injector. What else could it be?

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Check for a bad valve. i had the same problem only #3. it was a bad exhaust valve.

Posted on Aug 18, 2010

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Engine light flashing whole car shakes and motor sounds like a helacopter..... tested it and it said spark plug 4 misfired........... replaced all 4 spark plugs and it's still reading as a misfired spark...


Sounds like it's either a coil pack or an injector to me, try switching the number four coil pack with any of the other coil packs if the miss follows the coil pack you need to replace that coil pack. if not it's either a fuel injector or a mechanical problem inside the motor, I would rent noid lights from a local auto parts store and look for injector pulse in the cylinder with a misfire, if the noid light is flashing it may be better to leave it to a professional as it is likely internal engine damage. hope that helps. chris

Feb 15, 2014 | 2005 Hyundai Elantra

1 Answer

Mazda 2002 MPV cylinder 3 missfire


was the any oil on the coil boot? you can have a weak injector or a stuck vavle

Oct 31, 2012 | 2002 Mazda MPV

1 Answer

2002 elantra cyl 2 random misfire


Hi there:A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.

For example, a P0302 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #2; same condition in P0301 - cyl #1, P0303 - cyl #3 and P0304 - cyl #4.

A code P0300 (or 301, 302, 303 or 304) may mean that one or more of the following has happened:
Faulty spark plugs or wires
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector(s)
Burned exhaust valve
Faulty catalytic converter(s)
Stuck/blocked EGR valve / passages
Faulty camshaft position sensor
Defective computer

About your possible solutions, if there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.


Hope this helps.

Mar 09, 2012 | Hyundai Motor 2002 Elantra

2 Answers

Number 2 cylinder misfire code


could be bad spark plug. or coil over plug is bad

Nov 16, 2011 | Hyundai Motor 2003 Elantra

2 Answers

2001 elantra, check engine light comes on and I get a cylinder 2 misfire


Inspect #2 spark plug and the ignition wire to it. Inspect the connector to the plug and to the coil... replace as needed.

Nov 02, 2009 | 2000 Hyundai Elantra

3 Answers

2000 elantra misfire code and slow


try spraying some brake clean where intake manifold meets cylinder head and see if engine rpm changes if so chances are the intake gasket is leaking.

Jan 31, 2009 | 2000 Hyundai Elantra

1 Answer

2000 elantra misfire code and slow


The first thing you should do is check the voltage to the coil. the voltage should be around 12 or 13. If their is then the coil could be bad. Buying new spark plugs and wires would not hurt. Try replaceing them first, then the coil.

Please let me know if your problems presist.

Thanks, Charlie

Jan 29, 2009 | 2000 Hyundai Elantra

1 Answer

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.

May 19, 2008 | Hyundai Motor 2002 Elantra

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