Engine, Intake, Exhaust Modifications to your Normally Aspirated Hyundai engine. Cold Air Intakes, Spark Plugs/wires, Cat back Exhaust...etc.

cel P0304 - Misfire in #4 cylinder

Old Aug 20, 2004 | 09:38 PM
  #11  
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Thank you tibby01, that is one great link

Thanks to everyone else who replied.

I had already replaced plugs, but today got a good jumper lead for the wires, and eliminated them as a cause. I purchased a coil pack, but will check resistance per tibby01's link before installing. If Resistance is OK, I will do a compression test before taking out the injector.

So far, I have invested $15 in new plugs, eliminated wires, and have a sequence of tests available before I start to replacing the more expensive components.

I thank you all very much for your feedback. I am sure to be back to these forums, at least as an observer, for many times to come.
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Old Aug 20, 2004 | 10:34 PM
  #12  
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Default Re: updates...been a while**better quality pics uploaded**

I don't understand how you eliminted the wires.

Have you or do you ever use any fuel injector cleaner?

If not, run, don't walk, down to any local parts store or Walmart and pick up a can of B12 Chemtool. Put it in your tank ASAP. Use one can every 4 tanks. You'll be amazed.

Also, have you changed your fuel filter?
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Old Aug 20, 2004 | 10:54 PM
  #13  
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Default Re: cel P0304 - Misfire in #4 cylinder

1 can every 4 tanks? that often??? People like me who go through 3 tanks per week can't afford that too easily....
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Old Aug 20, 2004 | 11:13 PM
  #14  
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That's about how often I use it. Sometimes I'll go to like 6 tanks or so, but I can feel the difference. I stopped trying to use high grade gas years ago, so just one can of this now and then cleans her right up.

WalMart has it for pretty cheap mang.

You can buy it by the case too.
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Old Aug 21, 2004 | 02:26 AM
  #15  
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Default Re: updates...been a while**better quality pics uploaded**

Hrmm.. Any smoke (black/grey) when you run your car? If so injector probably.. If your injector gets plugged or fails, itll add fuel pressure to the other injectors, making them run richer, giving you black smoke ;/..
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Old Aug 21, 2004 | 08:46 AM
  #16  
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Default Re: South Chapter Members edit

Case closed

Culprit - Faulty coil pack.

Sentence - about a half hour of hard labour

Fine - $150 including taxes for coil pack and spark plugs ($Cdn)

How I eliminated the wires? When the delaer sold me the wires and coil pack, the parts guy gave me an old (but still good) wire. Just to be sure, I used the "test" wire on #3 and moved #3 to #4. Reset the CEL, and same code came up. So, on Monday, I will take back the wires.

I am not sure if we get B12 Chemtool in Canada. I'll look it up.

I, in a previous life, worked in a manufacturer of fuel filters. Be very wary of "white box" products and the one with the well known ffffour letter name!

Thanks again for the assistance and especially the link.
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Old Aug 21, 2004 | 05:59 PM
  #17  
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I'm glad you found the problem, I was going to suggest the IM. I warped mine this winter somehow and had the same problem, I heard a hissing or some sort of sucking from under the hood and my CEL was on. I didn't get the code though. I got it machined and it's all good now, but I had the same symtoms, misfires, stalling, not starting.

Anyways glad you found a cure.
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Old Sep 24, 2004 | 08:27 PM
  #18  
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ffffour letter name im lost :roll:
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Old Sep 24, 2004 | 08:35 PM
  #19  
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Default Re: eaten by a prelude :-/

QUOTE (blu_drgn)
ffffour letter name im lost :roll:


fram maybe??? I've always liked them, make nice oil filters laugh.gif
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