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Dead Spot from Air/Fuel mixture? Need Help Please

This is a discussion on Dead Spot from Air/Fuel mixture? Need Help Please within the External Engine forums, part of the LSx Technical Help Section category; okay heres how it is my car has a dead spot in it at around 3,000 rpms it happens all ...

  1. #1
    Still young and dumb 99m6t/a's Avatar
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    Dead Spot from Air/Fuel mixture? Need Help Please

    okay heres how it is my car has a dead spot in it at around 3,000 rpms it happens all the time not just sometimes. It also may occur at different rpms sometimes lower sometimes higher.

    Well me and my dad went to a dealer and told them we thought it was the cats to get it checked. The cats are 8yrs/80000 so it got checked for free.

    They told us it was a bad air/fuel mixture causing this. They however didn't tell us rich or lean or anything more than it was the wrong a/f mixture.

    What can cause this problem or can it be something other than a/f mixture.

    B.T.W-- The car has fresh plugs and wires so I highly doubt thats it.

  2. #2
    Senior Member SeVeReDiStOrTiOn's Avatar
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    05 Wrangler
    00 Z28 sold :-(

    Clean the maf with a non-residue electrical cleaner and see if that helps....you could also do a few runs on a dyno with a/f and see if it's rich/lean

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