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back fire

Discussion in 'XJ Technical Chat' started by bossone60, Jun 22, 2011.

  1. bossone60

    bossone60 Member

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    changed exhaust put on drag pipes now pops or back fires out of one side exhaust is two into one on each side[ hand made exhaust]
     
    bossone60, Jun 22, 2011
    #1
  2. jmilliken

    jmilliken Well-Known Member

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    We need more info... model, location, mods, etc.... put it in your signature please! thanks!
     
    jmilliken, Jun 22, 2011
    #2
  3. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    popping/backfiring is generally a sign of an overly lean condition on deceleration OR you need to have a look at your valve clearances right away. (Or both.)
     
    bigfitz52, Jun 22, 2011
    #3
  4. bossone60

    bossone60 Member

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    81 xj750 seca didn't notice it till i changed exhaust
     
    bossone60, Jun 22, 2011
    #4
  5. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    If you went from a stock exhaust to open pipes, then...

    My advice still stands.
     
    bigfitz52, Jun 22, 2011
    #5
  6. SQLGuy

    SQLGuy Well-Known Member

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    I'd look for a leak where the exhaust header bolts to the head, or a leak between pipe sections if it's not a single piece. If you're sucking outside air into the pipe at some point, that might lead to misfires like that.
     
    SQLGuy, Jun 22, 2011
    #6

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