Question about Hyundai Motor 2002 Elantra

1 Answer

Misfire on cylinder 1 and 3

The check engine light came on and we had it checked, computer said it was a misfire on 3, so changed spark plugs, wires and coil pack all of which did not solve problem. Changed fuel injector and now check engine light is back on and computer says misfire on 1 and 3.

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  • TigerRichard Nov 25, 2008

    I have the same problem. Changed the spark plugs. Same code. Misfire, cylinder No. 3. Auto Zone recommended to use a product to clean the injectors.

  • shoescrew May 04, 2009

    yep, same prob here too, when the check eng light came on in my 02 elantra it was for a cyl 3 misfire so i changed the plugs n wires. prob seemed to go away for a couple months but it came back. cyl 3 misfire again. i tried the injector cleaner stuff (few diff products) didnt help. also changed the wires again and double checked all the plug gaps. the rough idle is only getting worse. im still looking for an answer to the prob. its got 80k+ miles n i havent changed the belt yet. could the timing be a little off? ive seen comments for an indicator fault, but it feels like a 3 cylinder when it idles so i dont think that could be it, could it?

  • Anonymous Mar 12, 2014

    Misfire on Subaru legacy, changed plugs, wires, coil pack and injector, compression is about 170psi on all cylinders.

  • Anonymous Mar 22, 2014

    Misfire in cylinder 3&4

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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

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Missing,viborating


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The vibrating tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
P0313 - Misfire detected with low fuel

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Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The shaking tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
P0313 - Misfire detected with low fuel

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Possible Causes:

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Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
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Faulty coil or related wiring
Ignition module or related wiring issues
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