Ripping my hair out over a misfire

mantree Jan 24, 2017

  1. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    So I am starting a new thread since I am having isues with my old thread. I have a 00 xterra with 200 on it. It was running fantastically untell it started misfiring leaving the car wash. Pulling he codes gave me a cylinder 3 miss code. At first it was a little stumble that would pass after a second then it got to where it would act up untell I got up the speed then disappear eventually it started regestering a multi cylender misfire that would clear up once I would rev past 3k but now it will start to miss going down the road then clear up only to come back a cople of minutes later. So far I have
    Changed plugs and wires
    Changed distributer asembaly including coil
    Changed fuel filter
    Set timing to 15 btdc (corect for 00)
    Air filter has less than 4k on it
    Oil has less than 2k on it
    Maf and throttle body have both been cleaned with the last oil change.
    Dosnt smoke black or blue
    Don't loose oil or coolant

    So I am down to
    Fuel pump
    Fpr
    Watter in the tank?
    Fuel injector
    Wireing (I Realy hope not)

    What do you all think the next logical move is?

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  2. cpalka9

    cpalka9 Bought an X

    Messages:
    118
    Location:
    Ocala, FL
    Some kind of vacuum leak maybe? I don't know if it would throw a misfire code but it would make you engine not run right.
     
  3. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    I sprayed starter fluid around all the vacume lines but couldn't find anything there. I used a screw driver the check the injectors on that side and they all seem to be firing but 3 dose sound a little dull but that might just be me. I might try pluging off the resenators intake side of the maf and see if I'm leaking around one of them

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  4. Joey

    Joey First Fill-Up (of many)

    Messages:
    304
    Location:
    Indianapolis
    I had and issue close to this and it turned out to be a MAF. The little connector tab that the wire hooks to was broke. So it just got worst and worst. Also check the black hose between the maf and the throttle body for a possible leak. I know you said you cleaned the MAF but maybe its just flat out going bad.

    check this thread out he solves his issue on page 2
    http://www.xterranation.org/showthread.php?7232-Randomly-Dying/page2

    I know you are not dying, yet.....or are you? Yes you are and have been since you were born...
     
    Last edited: Jan 24, 2017
  5. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    So I unplugged the maf and it got way worse so I think it's working and I haven't bee throwing a lean or rich code. I am going to ohm the injectors and maby swap 2 and 3 and see if my misfire moves. It looks like I can get in to the pasanger side fule rail without pulling the intake off the engine. I'm also going to go to the auto parts store and test the fuel pump

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  6. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    So I had an idea at work this morning... I know scarry. I unplugged the cylender 3 injector low and behold no change in how the engine ran. So I ohmed it and found infinite resistance where as the cylender 1 injector was right around 13 ohm. I think my injector had kicked the bucket. I will try swapping the injectors between 3 and 1 and see if my misfire moves with the injector but that will wait untell I find where my scanner whent.

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  7. ElPincheGuero4

    ElPincheGuero4 Need Bigger Tires

    Messages:
    796
    Location:
    Cohoes
    Why bother? If it ohms out bad just replace it lol


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  8. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    Ya but I want to know if there is something elce wrong as well if the problem moves then there are no underlying isues

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  9. ElPincheGuero4

    ElPincheGuero4 Need Bigger Tires

    Messages:
    796
    Location:
    Cohoes
    There still could be. You know for a fact already that the injector is not operating because you unplugged it and nothing changed so you already know that the issue will move when you move the injector creating an unnecessary step in your investigation.


    It is what it is, grow a beard.
     
  10. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    I had a beard but they made me shave it for my ER clinical... I am ordering a reman injector but am starting to wonder if it would be worth it to order all 6 and just do them all at once. I can get at the pasanger 3 without pulling the intake but if I do all 6 I could fix my knock sensor while I was I there.

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  11. Muadeeb

    Muadeeb Bastard Admin from Hell Admin

    Messages:
    15,767
    Location:
    Dallas
    If you're not supercharged, don't make the extra effort to get at it.
     
  12. ElPincheGuero4

    ElPincheGuero4 Need Bigger Tires

    Messages:
    796
    Location:
    Cohoes
    That's my signature lmao


    It is what it is, grow a beard.
     
  13. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    I would only realy bother if I was already in there to get at the injectors and I would relocate it to some here else on the block for simplicity

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  14. harryron

    harryron Suspension Lift Supporting Member

    Messages:
    4,954
    Location:
    ohio
    Check for a vacuum leak.

    sent from the middle of a corn field.
     
  15. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    Already checked for vacume leaks with a can of starter fluid but nothing from that, o did replace the vacume line on the dash pot over the summer when I developed a cracked in it up in the mountains coming back from a weding. I usury do a quick check for vacume leaks when I do oil ever since my 4runner had the entire vacume system rebuilt (took about 3 hours of running vacume line)

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  16. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    Posted in new thread
     
    Last edited: Jan 26, 2017
  17. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    New injector shipped today and will be here by the 1st, hope to have my truck on the road next week again and I can stop driving the beetle

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  18. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    The injector came today. Installed it but had to replace the screws
    [​IMG]
    After a rough start the truck runs like new.
    [​IMG]
    The old injector was cracked when it came out.

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  19. Muadeeb

    Muadeeb Bastard Admin from Hell Admin

    Messages:
    15,767
    Location:
    Dallas
    Good find! Glad you got it fixed

    Sent from the 4th circle via directionally confused otters
     
  20. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    Any body that's interested they are 5mm with a .8 pitch thread I used alen key bolts since I have ball end alen keys that makes it easyer to get in to the tight corners in the engine. You also need a 5 mm lock washer.

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  21. Muadeeb

    Muadeeb Bastard Admin from Hell Admin

    Messages:
    15,767
    Location:
    Dallas
    You did it without removing the intake? Bonus for that!
     
  22. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    I avoid removing anything I don't absolutely have to. I did have to remove a ground bolt and move the wireing loom.

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  23. mantree

    mantree First Fill-Up (of many)

    Messages:
    380
    Location:
    Fort Collins
    Well looks like I fixed it just in time we had a ice storm last night. Had to respond to a heart tack becaus ems was so busy with trama calls so all available ems were put on call

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  24. Charles c

    Charles c Test Drive

    Messages:
    7
    im just going to put this out there s
    as an fyi i had a p0300 code random misfire after pulling my hair out and in bald ,it turnded out to be the bearing in the distributor that was bad very easy to change.
     

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