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i smell gas

This is a discussion on i smell gas within the External Engine forums, part of the LSx Technical Help Section category; Anyone with these mods LT headers 13111 O2s ORY SLP LM2 Tune by frost If so do you have a ...

  1. #1
    Member damianj03's Avatar
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    slap your mama red
    1998 trans am

    i smell gas

    Anyone with these mods

    LT headers
    13111 O2s
    ORY
    SLP LM2
    Tune by frost

    If so do you have a gassy smell from your exhaust?

  2. #2
    Life in the Fast lane sunsetorangess's Avatar
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    Met. Sunset Orange
    01 SS

    Even with a good tune, You eliminated your cat's which would break down that smell.
    Your allways going to have a bit of a gas smell. I guess my question would be how strong and where is it coming from?
    J
    2001 SS, Its not the car its the Driver that matters....

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

    wait until you put a cam in it.

  4. #4
    Member damianj03's Avatar
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    slap your mama red
    1998 trans am

    Quote Originally Posted by sunsetorangess View Post
    Even with a good tune, You eliminated your cat's which would break down that smell.
    Your allways going to have a bit of a gas smell. I guess my question would be how strong and where is it coming from?
    J
    it just smells like exhaust gas like from an old style car you know like 70s or so

  5. #5
    Member Rk ws6's Avatar
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    2001 ws6

    Quote Originally Posted by 0rion View Post
    wait until you put a cam in it.
    roger that

  6. #6
    Auto Painter RyanJM's Avatar
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    Quote Originally Posted by damianj03 View Post
    it just smells like exhaust gas like from an old style car you know like 70s or so
    Is your catback clamped or welded to the y pipe. I had mine welded and most of the smell went away. It'll always have some smell since you have no cats it's basically like driving an old muscle car with fuel injection instead of a carb. Also if your tune is on the rich side it will smell a little more.
    1998 Trans Am 85k miles.
    Bolt ons, MS3 113LSA cam, Circle D Stall, Tune, Modified WS6 style hood, Full Suspension, 6000k HID's, Clear Side Markers w/ Leds, Led 3rd Brake Light and 18" AR Staggered Killer Wheels w/ BFG KDW NT's.- Weekend Toy/DD
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  7. #7
    Member damianj03's Avatar
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    slap your mama red
    1998 trans am

    its all clamped on. And i dont know what my tune is set at i got a mail order tune from frost i sent him and email asking about what all i got and he replied from his home computer telling me that he is at his home computer answering emails and couldnt tell me what i got and said that i got whatever i asked for. But that didnt help me because i forgot what i asked for.

  8. #8
    Auto Painter RyanJM's Avatar
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    Only way to tell os have a mechanic with a wideband 02 check it. We used one when we did the street tune on my car. Also those clamps tend to leak so make sure there tight or hav it welded like mine. Another place to check it your header gaskets. If you used new ones your safe but if you reused the old ones you could have a leak there. I know from the 1st set of hookers they reused the gasket and it leaked. When I put the QTP's I bought new gaskets. But the y pipe to catback clamp is a spot that I noticed leaks on alot of setups. I had my friend at Midas weld up mine and several of my friends cars and it fixed most of the gas smell.

  9. #9
    Member damianj03's Avatar
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    slap your mama red
    1998 trans am

    i reused my old gaskets and have checked under the hood a couple of times to make sure everything is fine and i dont hear and exhaust leaks anywhere along the manifolds.

    What is the ratio that the air fuel needs to be for optimum performance. And where would you put the wideband to check it?

  10. #10
    NY Representative basballny2's Avatar
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    its guna smell like gas since your cats are off.....if you dont hear any exhaust leaks anywhere its nothing to worry about

  11. #11
    Auto Painter RyanJM's Avatar
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    Depends my y pipe has a plugged hole for one but we use one that clamps on the exhaust tip.
    If the gaskets aren't leaking you can either Jack up your car or if you have a buddy with a lift check where the y pipe connects to the catback. It'll always smell like gas but I don't notice it in my car since I did some welding and leaned the a/f ratio. You have to have someone check it I'm not sure what mine is since I was doing some detailing while my car was being tuned. Any good local shop that tunes cars should know and can check it.

  12. #12
    Car Nut ICRAZY6's Avatar
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    I would say most of the gas smell can be taken care of with a tune. But there will be always a little smell of gas. It's a muscle car, it should smell like that way.

  13. #13
    Member blackbird0230's Avatar
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    I like the smell so I'm not wanting a change. lol

  14. #14
    Auto Painter RyanJM's Avatar
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    I had to retune mine because that dyno tune before and after the leaks the smell was eye watering. Now that it's welded I have the new tune it still smells buy I don't really notice it in the car just of i'm standing near the back.

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