2004 misfire check engine light
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Thread: 2004 misfire check engine light

  1. #1
    crv|oc Rank: Member
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    2004 misfire check engine light

    Ok I am hoping someone can help me. I got a 2004 crv. A few weeks ago the check engine light came on so I brought it to my mechanic. He said it was a misfire so they did a switch of the coils from 2 to 4 or something like that and said if it came on again they would have to do an adjustment or replace the spark plugs. A few days later it came on again and I drove on it for a few days and then it went off after three days. About 4 days later it came on again. I brought it to the dealer and he said it came up misfire on all cylinders. He replaced all the plugs. He told me that if it comes on again that I need to drop it off overnight so they have it first thing in the morning and they can adjust the valves in the morning when it is cold. Sure enough today I went out and drove about quarter mile down the road and the light started to blink and then came on and stayed on. Now some of the things I noticed is that it came on all during cold weather and I believe when it came off and stayed off for a few days it was during a warmer week in Dec (New Jersey) Now I will drop it off and get the valves adjusted. I am wondering if anyone has insight on this or has dealt with this. I got real scared when I read some threads about heads having to be replaced at 3000 plus dollars etc but all those seem to be 2001 or older engines and from what I read on here the 2004 engine is different. Please if anyone has insight I would greatly appreciate it.

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  3. #2
    Everything in Moderation Carbuff2's Avatar
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    First of all, don't worry about a bad head...the 2004 K24 engine uses roller rocker arms and does NOT have a problem with cylinder heads (or valve adjustments) like the first Generation (1997 - 2001) CR-V.



    You need to get the exact code that turned on the trouble light.


    The K24 engine uses coil-over-plug ignition, meaning that there are individual coil-packs for each spark plug. If the previous codes indicated a misfire on one cylinder, then moving the coil-packs around to see if the problem follows them is a valid troubleshooting method. An experience mechanic can tell by looking if there is a bad coil-pack...there are usually signs of arcing on the connections.

    A misfire on "All cylinders" would be a different scenario.


    I would ask the mechanic if the new plugs are the OE Iridium type? If not, that would be my first step in resolving your problem.


    If you are in north NJ I can recommend a good independent Honda specialist in Parsippany.
    Atwell "Buff" Haines
    '06 AWD CR-V, 5 speed MT!
    '07 Fit Sport, 5 speed MT!
    NJ

    The Law of Logical Argument - Anything is possible IF you don't know what you are talking about.



  4. #3
    crv|oc Rank: Member
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    Well that is a relief about the engine head. As far as the plugs being replaced they were with iridium spark plugs. When I first brought it when it started to happen it was a mis fire on one plug and they did a switch like you just stated. When I brought it back after it coming back on it had a problem code of mis fire now on all cylinaders. That is when they replaced them all. The car has 93,000 miles so I figured they should be changed anyway. He told me that if it still does it again then bring it back over night. I believe what he said was he would need to adjust the coils if that makes sense when it was cold. I got the car back on Monday night and drove it tuesday and yesterday no problems, then today I went out (very cold) and got down the road and the blinking started and then it stayed on. I have not noticed anything with all of this as far as the car sounding or driving differently.

  5. #4
    Everything in Moderation Carbuff2's Avatar
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    The next step is to post the exact codes you are seeing now.

    Glad that your tech is using the correct parts!

    The only other thing I would think to look for is moisture inside the coil-pack/sparkplug cavities. Perhaps some conductive grease where the coil-packs meet the cylinder head (they need a GOOD ground)...the grease will keep moisture out as well as providing a good conductive surface.

    There is no adjustment on the coil packs---they simply snap over the plugs and are secured by one bolt. (That's another reason OE plugs are best---they have the same dimensions...)

    Let us know the outcome!
    Last edited by Carbuff2; 01-01-2009 at 10:31 AM.
    Atwell "Buff" Haines
    '06 AWD CR-V, 5 speed MT!
    '07 Fit Sport, 5 speed MT!
    NJ

    The Law of Logical Argument - Anything is possible IF you don't know what you are talking about.



  6. #5
    crv|oc Rank: Member
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    thanks for the relief and the obvious knowledge you have about crv's. I am gonna leave it at the mechanic tonight and find out tommorow. Hopefully it will be corrected soon.

  7. #6
    crv|oc Rank: Member
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    Ok I just got my car back. Apparantly the valves needed to be adjusted. My mechanic said they were extremely tight. I haven't driven the car too much since getting it back but so far no check engine light.

  8. #7
    Everything in Moderation Carbuff2's Avatar
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    Thumbs up

    Give us a report in a week or two.
    Atwell "Buff" Haines
    '06 AWD CR-V, 5 speed MT!
    '07 Fit Sport, 5 speed MT!
    NJ

    The Law of Logical Argument - Anything is possible IF you don't know what you are talking about.



  9. #8
    crv|oc Rank: Member
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    I will def. I thought I noticed one thing but perhaps that is me not having knowledge of cars and be paranoid. When I was driving it back on the highway I was at 80mph and felt like the rpms were high and it was not in the next gear (like 5 speed). Cars were ahead so I had to hit my brake. Does changing or adjusting the valves change the rpms and gears. I thought with the little knowlege I had that was the trans and would have nothing to do with it.

  10. #9
    Everything in Moderation Carbuff2's Avatar
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    If the mechanic disconnected the battery (did your radio stations need to be reset?) the engine computer might need to re-learn it's old habits.

    Or, if the engine was "racing" on its own, a vacuum line may have been knocked loose. If indeed there is a problem, take a quick look under the hood (there is a sticker showing vacuum hose routing under there) otherwise bring it back in.
    Atwell "Buff" Haines
    '06 AWD CR-V, 5 speed MT!
    '07 Fit Sport, 5 speed MT!
    NJ

    The Law of Logical Argument - Anything is possible IF you don't know what you are talking about.



  11. #10
    crv|oc Rank: Member
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    Ok an update. Yesterday I drove the car all day. The rpm factor I thought was non existent. All though the battery didn't seem to be changed perhaps it was either my computer learning as you said or just in my head. I think I am leaning towards in my head. The light did not come on at all yesterday and I just turned the car on a little while ago while it was cold and it still did not come on. I did notice yesterday that the car idles a little bit louder than before but not real loud but me not knowing much about cars I would assume that would be normal when adjusting the valves. Again time will tell and I will update this if it comes on again and if does not come on between now and two weeks I will let everyone know. Hopefully if it was just the valves then this thread might help someone. MY car has about 92,000 miles on it. I did read that the car is suppose to go without adjustments on the valves till 110,000 so it should be interesting to see.

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