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Discussion in '1st Gen. Tacomas (1995-2004)' started by bryans 86, Feb 24, 2009.

  1. Feb 24, 2009 at 4:36 PM
    #1
    bryans 86

    bryans 86 [OP] Member

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    so my truck ( 2001 double cab 3.4) is throwing a p0300 code ? it comes up as multiple misfire. when i step on the gas and really get into it kind of pop some time almost like a back fire . any ideas
     
  2. Feb 24, 2009 at 4:40 PM
    #2
    devilsalmostfree

    devilsalmostfree Well-Known Member

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    have u done a tune up on it latelty? if so, did u gap ur plugs right?
     
  3. Feb 24, 2009 at 4:48 PM
    #3
    Delmarva

    Delmarva Mayor of TW

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    Great thread title... :thumbsup:

    :rolleyes:
     
  4. Feb 24, 2009 at 4:49 PM
    #4
    wildjerseyfirefighter

    wildjerseyfirefighter I sell fishing and fishing accessories

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    made ya look, didnt it:D
     
  5. Feb 24, 2009 at 4:50 PM
    #5
    Delmarva

    Delmarva Mayor of TW

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    only because my mouse rolled over the thread... so then I decided to post that jerky thing I said... :laugh:
     
  6. Feb 25, 2009 at 5:53 AM
    #6
    bryans 86

    bryans 86 [OP] Member

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    yeah i figured id at least get people to look at it. well i just bought the truck about 20 days ago. now its throwing this code. ill have to replace my spark plugs and inspect my spark plug wires make sure there are no cracks. i wasent sure if this was just maybe a commom problem with a simple fix.... that would be to easy also the truck seems kind of bagless untill you hit 3700 rpm. then it really comes into it maybe something to do with the check engine light
     
  7. Feb 25, 2009 at 6:27 AM
    #7
    devilsalmostfree

    devilsalmostfree Well-Known Member

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    Deck plate mod, intake silencer removed, AFE Pro Dry S Air Filter, debadged, Goodyear Duratracs 265/75R16. Flowmaster knock-off muffler!
    i would think that more people would chime in, maybe they will later on today. i hope with changing the plugs & wires do the trick though!
     
  8. Feb 25, 2009 at 6:28 AM
    #8
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    It has everything to do with the engine light. You first step seems logical. Replace the plugs and wires. This code should clear itself quickly after you change them and (if) that it is indeed the problem.
     
  9. Mar 6, 2009 at 2:50 PM
    #9
    bryans 86

    bryans 86 [OP] Member

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    yeah so its just getting worse i changed the coil for cylinder number 6 and looked at the plug which seemed fine ( ill replace tommorow need to go to the parts store) and its still runs like shit. idles rough and when u drive it. the truck skips all the time and sometimes the check engine light flashes a few times. ill try the new plug and reset the computer and do a compression test on the cylinder....
     
  10. Mar 6, 2009 at 3:10 PM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    FlimFlubberJAM
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    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
    • Faulty catalytic converter(s)
    • Stuck/blocked EGR valve / passages
    • Faulty camshaft position sensor
    • Defective computer
     
  11. Mar 6, 2009 at 3:17 PM
    #11
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Are you running the OEM twin electode plugs?
     
  12. Mar 6, 2009 at 3:22 PM
    #12
    bryans 86

    bryans 86 [OP] Member

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    yeah stock twin plugs and it was also throwing a p0303 code i think saying cylinder number 6 was misfiring.
     
  13. Mar 6, 2009 at 3:23 PM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    The last number indicates the cyl. #, so it means cyl. #3 had a miss fire.
     
  14. Mar 6, 2009 at 3:24 PM
    #14
    gonzo6up

    gonzo6up Well-Known Member

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    Hey man, i had a 95.5 and a 97 3.4 V6 tacoma and both trucks had the same issue. How many miles do you have? I had a hard time narrowing my problem down between hte plugs/ wires and the coils. On my 95 it ended up being a coil which is around $120 so i replaced the wires too while i was at it. Plugs never did solve the problem. One way i diagnosed it was to hook a computer up to the truck while i drove it( buddy had one) and find out which cylinders were misfirring. If the coil is bad that cylinder along with the cylinder that the wire is running to should misfire. I then moved the coil to a different cylinder to see if the problem followed or stayed the same. Since you have a new coil you might be able move it to cylinder 5 and see if hte results are better/ same or worse. If moving the new coil doesn't change anything at all pickup a TPS sensor for like $25. On my 97 i thought i was having the same problems so i went out and blew a bunch of money on coils/ wires becasue the symptoms were almost exactly the same but the problem then was a simple TPS( Throttle Positioning Sensor) and i remember my CEL comming on and going off when it would surge or cut out. I would also clean the MAF sensor and throttle body while your changing parts. Things are just comming to mind here so bare with me... Get a can of seafoam for the truck too becasue that willl help out alot as far as a tune-up goes, I hope this helps :)
     
  15. Mar 6, 2009 at 3:24 PM
    #15
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    Are your plug wires propperly attached to the plugs?
     
  16. Mar 6, 2009 at 9:52 PM
    #16
    kevhogaz

    kevhogaz Low Speed, High Drag

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    We see this a lot on the 3.4's and a lot of the time it's a coil that's gone bad. If you've already replaced the plugs and wires, the coil's the only thing left.

    I didn't see where you're located, but if you're in AZ, I have a few good coils for testing purposes, if needed.

    Never mind about borrowing the coil, I see you're on the other side of the world from me.
     
  17. Mar 6, 2009 at 11:13 PM
    #17
    bryans 86

    bryans 86 [OP] Member

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    thanks for the offer on the coil. but maybe tommorow ill try reseting the computer and switching the coil around . it was a p0306 code actually sorry. and yeah the spark plug wires are all attatched. ill try the switching around the coils tommorow
     
  18. Mar 7, 2009 at 12:57 AM
    #18
    darkturtleninja

    darkturtleninja 9th level dungeon master

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    rotor "button" burnt up inside the distributer perhaps?
     
  19. Mar 7, 2009 at 5:14 AM
    #19
    kevhogaz

    kevhogaz Low Speed, High Drag

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    No rotor on the 3.4, they've got coil on plug, with two cylinders firing from one coil.
     
  20. Mar 7, 2009 at 5:17 AM
    #20
    kevhogaz

    kevhogaz Low Speed, High Drag

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    When you pull the coils to check 'em, look real close at the boots, and you'll probably see where there's been spark exiting the boot, and making contact with the metal tube. The rubber will usually be white on the inside where the spark is exiting.

    Good luck, and hopefully you'll find the problem.
     
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