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exhaust sputter

This is a discussion on exhaust sputter within the General Help forums, part of the LSx Technical Help Section category; after my header, slp catback install (no cats) i noticed that when my car is idleing after it gets hot ...

  1. #1
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    exhaust sputter

    after my header, slp catback install (no cats) i noticed that when my car is idleing after it gets hot it will sputter or puff out the exhaust almost like a miss but not really i runs fine and dosent miss at higher rpms just notice it at idle.
    Last edited by 01tao6gto; 05-26-2008 at 08:20 PM.

  2. #2
    Member krug07's Avatar
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    pewter
    01 trans am ws6

    big bump on this!! im trying to figure out what this is also mine does this also a puff sound and its driving me crazy what this is. everyone chip in if you have any idea what this is.. my setup is no cats ory y pipe dynomax bullet muffler.. advise please

  3. #3
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    do they sound like a possible leak?

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    it almost sounds like a miss, but runs find at high rpms!

  5. #5
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    well, it could be missing at idle and not at wot. How many miles on the plugs and wires?

  6. #6
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    new plugs and plug wires and usually if it is electricial you will notice it when the car gets under a load! but it runs and sounds fine other than at idle

  7. #7
    Member krug07's Avatar
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    pewter
    01 trans am ws6

    new plugs and wires also. only does it at idle never had a problem at any rpm. its like a puff noise. slight miss noise.

  8. #8
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    thats exactly what it is. what the hell is it it pisses me off!!!

  9. #9
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    is it a constant rythmic puff puff puff or an occasional puff? Is it a BIG puff or just slight puff?
    Have you guys had the computer retuned for your mods? Headers require a tune on these cars.

  10. #10
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    it is eratic but when it gets hot it gets worse!

  11. #11
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    anyone have a clue!

  12. #12
    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    Maybe its unburned gas in the exhaust that popping off? Have you had your car retuned since the header install?

  13. #13
    Junior Member bmax327's Avatar
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    Black
    1999 Formula

    Quote Originally Posted by Cutlass View Post
    Maybe its unburned gas in the exhaust that popping off? Have you had your car retuned since the header install?
    +1, sounds like your tune, or lack of.



    .
    1999 Formula, M6, mostly stock daily driver. ARH Headers, Hooker cat back, Koni's. EFI live V2, LC-1 serial connection. BRE custom cam

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