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Kia rio2008 misfire

Had a standard diagnostic check and all it said was it is misfiring. Thought it was maybe spark plugs could not find any. Are there other reasons it could be misfiring?

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: check engine light 2004 GMC Yukon

When my check engine light went on, it was a oxygen sensor

Posted on Jan 15, 2009

  • 1 Answer

SOURCE: 99 4runner 5vz-fe 3.4 misfire

I know this post is old, but right on the engine theres a sticker that says use multi-ground plugs only. I read a similar problem like yours and it seemed to turn out that the spark was arcing to ground over the ceramic on the plug. So maybe it could have something to do with the single ground plugs.

Posted on Jan 23, 2009

  • 315 Answers

SOURCE: 1996 Jeep GC - Diagnostic tool identified cylinder misfire

P0300 Code - Random Misfire

Symptoms Symptoms may include:

  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present
Causes A code P0300 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

Posted on Mar 05, 2009

  • 80 Answers

SOURCE: 2002 Ford Ranger check engine light indicating misfire

Code P0301
Ignition Coil Pack
Ignition Cable
Spark plug
Clog or dirty fuel injector
Evap canister purge valve
Engine Compression
fuel pressure

you have 3 type of engine for your truck
2.3L 4 cylinder
3.0L 6 Cylinder
4.0L 6 Cylinder

need to know that type Engine

The reason why the service light come on because it is a hard code
not a soft code.

Let me know

Posted on Sep 20, 2009

SOURCE: 99 dodge caravan #4 cylinder misfires, i replaced

This is a known dodge issue replce the injector!!!!! done deal

Posted on May 07, 2010

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My 1999 kia sportage glx se is misfiring but still drives,there is no warning lights on dash no engine managment light on either, would this just be the spark plugs ot the spark plug leads that is causing...


Check your fuses the one for check engine light might be bad. Every time I had a misfire with my Kia the check engine like came on. You may also take it to an Auto Zone or a store that checks the computer of your vehicle for free. If it is a misfire there are a few remedies I know of

First if you haven't changed your spark plugs in the past few years you should look at replacing them.

Second older vehicles the gas tends to get sediment in it because you are not using all of the gas in your tank even if you run it out. I found that out because it would drive fine until I filled the tank up which in turn churned up the sediment from the bottom went through my gas line and caused a misfire. The easiest way to fix that is maybe a gas treatment which may break down the sediment. The harder and more expensive is drain the tank change the pump and the fuel filter. You don't need to drain the tank entirely to change both but it defeats the purpose of change both and still having sediment in the tank.

Third in order get the computer checked, change spark plugs, have leads checked, then use fuel treatment. Just so you know when you use fuel treatment it will run a little rough at the beginning because the sediment is being broken down give it a week or so to let it run its course.

good luck

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P0300 Multiple/Random Misfire detected.
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1 Answer

Kia sportage 2002


you posibly have a misfire due to fauly ignition coils and spark plugs - vehicles are notorious for this maybe a leaking valve cover that leaks oil to spark plugs clean holes before removing spak plugs and check ignition coils ( remove boots) intake has to come of to replaced spark plugs.

Aug 23, 2008 | 2002 Kia Sportage

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