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new headers & tune ? running rich at idle

This is a discussion on new headers & tune ? running rich at idle within the External Engine forums, part of the LSx Technical Help Section category; I had kooks long tubes installed with off road y-pipe and a ls6 intake with dyno tune. At idle I ...

  1. #1
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    new headers & tune ? running rich at idle

    I had kooks long tubes installed with off road y-pipe and a ls6 intake with dyno tune. At idle I can see some smoke coming out of the exhaust.
    Not a lot and I do not see it driving. Do I have a rich idle tune or is this normal with out cats.
    Last edited by skar; 05-03-2006 at 05:23 PM.

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    member since may 2000 nhraformula's Avatar
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    black
    2000 nhra edition formula

    i have never noticed smoke.
    i do smell the fumes from time to time though.
    alot of smoke or alittle and what color is it?

    its nothing you should worry about
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  3. #3
    Member Flobeast385's Avatar
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    Pewter
    1999 TA M6

    After i installed my LTs i did notice a little more "smoke" coming from the pipes but it is actually just raw exhaust. The converters burn up most of the raw exhaust t o keep the emission levels low coming out of the tailpipe. Also the new headers and pipes will have residue on them from the factory and will take a while to burn off.
    99 Trans Am M6
    SLP lid/FRA/TBB/Comp 224/224 581/581 112LSA
    Comp 918s/Comp PRs/Hedman TorkStep LTs
    Custom Y/Exhaust/Pro 5.0

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    Only a small amount of smoke ? light gray I think. Car seems to run ok. 303hp to 336 on mustang dyno after install and tune.

  5. #5
    member since may 2000 nhraformula's Avatar
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    im betting its raw exhaust.
    if you didnt see any before headers, thats what it is.

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