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BackFire...popping at idle?

Discussion in '4 Cylinder' started by mobius, Apr 27, 2010.

  1. Apr 27, 2010 at 6:34 AM
    #1
    mobius

    mobius [OP] Well-Known Member

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    Hey guys,

    Quick question...I have an 07 access cab 4x4 4banger and notice that it backfires a bit. For example, I noticed it the other day driving down a back road...down hill, 4th gear, about 35mph. The other day I noticed it pop....pop...pop during idle. I usually run the cheap gas in it, 87. Has anyone noticed this? Should I be worried?
     
  2. Apr 27, 2010 at 6:41 AM
    #2
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
    No codes or CEL?

    Sounds like you maybe runnig rich or possibly a timing issue.

    I would suggest cleaning your MAF and pulling the battery NEG cable for a few minutes. Maybe the ECU developed a brainfart. Double check for some loose vac lines too.
     
  3. Apr 27, 2010 at 7:00 AM
    #3
    Danosabre

    Danosabre Well-Known Member

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    When was the you cleaned your fuel system. Put a can of seafoam in your tank.
     
  4. Apr 27, 2010 at 7:16 AM
    #4
    mobius

    mobius [OP] Well-Known Member

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    Thanks for the reply guys...honestly I've never cleaned my fuel system. Guess its time :) Seafoam? Never heard of that. Is it something I can pick up at Auto Zone? Just pour it in and run the engine?
     
  5. Apr 27, 2010 at 7:20 AM
    #5
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
  6. Apr 27, 2010 at 7:34 AM
    #6
    mobius

    mobius [OP] Well-Known Member

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    Thanks 98 for the info...very helpful. Guess I now have plans this weekend :D
     
  7. Apr 27, 2010 at 7:35 AM
    #7
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    05 Tundra SR5 (+250k AND COUNTING), 88 SR5 PU (SOLD), 98 TRD OR (CRUSHED)
    5100's all on fours
  8. Apr 27, 2010 at 11:50 AM
    #8
    mobius

    mobius [OP] Well-Known Member

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    What should the timing be? What are you guys running? I get a ton of highway miles.
     
  9. Apr 27, 2010 at 11:53 AM
    #9
    Danosabre

    Danosabre Well-Known Member

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    How many miles on it, and when did you last change the plugs?
     
  10. Apr 27, 2010 at 11:54 AM
    #10
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    5100's all on fours
    The timing is electronic and not adjustable. It's controlled by your crank sensor. Don't read into this too much yet. Do the simple easy fixes first or until a code pops up.
     
  11. Apr 27, 2010 at 12:04 PM
    #11
    mobius

    mobius [OP] Well-Known Member

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    Thanks 98...will do.

    Dano...I have 65k on it, changed the plugs around 25k. Probably wouldn't hurt to throw a new set in?
     
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