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Exhaust pops

Discussion in 'XJ Technical Chat' started by Sonny573, Aug 4, 2013.

  1. Sonny573

    Sonny573 Member

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    I went on a long ride today and while in gear I started to hear backfires and pops. As soon as I brought the clutch in it would stop. I never got faster than 50 mph.

    Im not sure what is causing this. It hasn't happened before.

    It runs perfectly with the 4 into 2, cut off baffles, and I reset the jets and installed uni pod filters last year... I put some sea foam into the tank and changed the gas from premium to ultra.

    could it be the mixer?

    thanks

    Sonny
     
    Sonny573, Aug 4, 2013
    #1
  2. wink1018

    wink1018 Active Member

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    did you upgrade your jets when you installed the pod filters? If so, what jets did you use?

    It sounds like a possible lean issues.
     
    wink1018, Aug 4, 2013
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  3. mwhite74

    mwhite74 Member

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    Let's see your plugs... I would get a lot of popping on slow-down when my mixture was lean.

    I wouldn't go any higher than 91 octane, btw... No reason, just 91 should be more than enough.

    M
     
    mwhite74, Aug 4, 2013
    #3
  4. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Popping indicates a lean condition.
     
    bigfitz52, Aug 5, 2013
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