05 Jeep Liberty sport power issue

Discussion in 'KJ General Discussion' started by desillman, Jul 29, 2020.

  1. desillman

    desillman New Member

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    I was seeing if I can pick someone else’s brain about this issue. My Liberty doesn’t seem to have the power it once had. I’ve had it for a few years now and when I bought it, it seems to have a little “snap” when you got on it. Now it just seems a little doggy on acceleration and power in general. Would this be possibly a fuel system issue(filter,injectors,pump)? I’ve done all maintenance on it and have never replaced any of these things. Just wondering if anyone has had this issue before. Thanks
     
  2. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

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    Welcome to the forums.
    Did you replace the spark plugs with these exact NGK copper cores ?
    These are the only plugs the Jeep likes and they should be replaced every 35K.
    [​IMG]
    If fuel pressure is suspected, get a fuel pressure gauge (hooked into fuel rail) & report back the psi, key on then running, and then off for 10 minutes as a leak down.
     
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  3. Shane Giggie

    Shane Giggie Full Access Member

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    I agree, change the plugs. Try some Gumot fuel injector cleaner with the P.E.A, my 06 was a little doggy and it brought it around.
     
  4. Bill chase

    Bill chase New Member

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    do a carbon removal treatment of the intake and valves. that will wake it up.