Thread: Will removing the catalytic converter make the 08 models burn more gas??

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  1. #1 Will removing the catalytic converter make the 08 models burn more gas?? 
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    Hello everyone. I am considering removing my cat and going with a straight pipe instead of buying a new one. But I have heard from a few people that the 08 models must have a cat or it will burn gas like crazy. Does anyone know for sure if this is true for that particular year??
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  2. #2 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Nothing good comes with removing the cat. Car is going to fail emissions, it will set codes on the dash, probably will affect mileage and it's going to smell like ass when it's idling with your windows open.

    I wouldn't bother.... Put a high-flow cat on if anything instead of going without. Those can be had for <$100 instead of $300+ for an OEM comparable at a muffler shop.

    I am sure someone will come in say "but you'll have more POWAAAAA". Unless your car is insanely balls-to-the-wall modified, I see it being very negligible.
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  3. #3 Will removing the catalytic converter make the 08 models burn more gas?? 
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    Just saying. High flow cat will probably set the ses also

    Ask me how I know
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  4. #4 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    It will likely use more gas if it keeps running a cat test because it's no longer there. And the check engine light will always be one and being a 2008 is got a year only computer with can bus.

    I would find an aftermarket cat and weld it in place. I would not get a high flow unit as it does what it says, flows too well for what the car wants to see.

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  5. #5 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by mcdavidhome View Post
    Hello everyone. I am considering removing my cat and going with a straight pipe instead of buying a new one. But I have heard from a few people that the 08 models must have a cat or it will burn gas like crazy. Does anyone know for sure if this is true for that particular year??
    Thanks for the info
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  6. #6 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by Fivefingerdeathpunch View Post
    It will likely use more gas if it keeps running a cat test because it's no longer there. And the check engine light will always be one and being a 2008 is got a year only computer with can bus.

    I would find an aftermarket cat and weld it in place. I would not get a high flow unit as it does what it says, flows too well for what the car wants to see.
    Thanks for the input..
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  7. #7 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by Damnir View Post
    Nothing good comes with removing the cat. Car is going to fail emissions, it will set codes on the dash, probably will affect mileage and it's going to smell like ass when it's idling with your windows open.

    I wouldn't bother.... Put a high-flow cat on if anything instead of going without. Those can be had for <$100 instead of $300+ for an OEM comparable at a muffler shop.

    I am sure someone will come in say "but you'll have more POWAAAAA". Unless your car is insanely balls-to-the-wall modified, I see it being very negligible.
    Thanks for the info...
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  8. #8 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Go cat-less and get a tune that way the codes won't show up and you won't burn thru gas
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  9. #9 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
    Turbo is the way to go. REDCRAPGP's Avatar
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    Get a high flow cat and either a tune or use the spark plug fouler trick..
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  10. #10 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by HighOctaneRacing View Post
    Go cat-less and get a tune that way the codes won't show up and you won't burn thru gas
    Ok thanks.
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  11. #11 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by REDCOMPG View Post
    Get a high flow cat and either a tune or use the spark plug fouler trick..
    ok. How can i get instructions on doing the fouler trick?
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  12. #12 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Youtube it.

    https://www.youtube.com/watch?v=KnYUHwTxKkE

    This will get you started.
    Quote Originally Posted by Sven The Sexman View Post
    Bill had a major role in all of the Star Wars movies; he was the force.
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  13. #13 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by mcdavidhome View Post
    Ok thanks.
    You can't tune an 08 period to end
    Quote Originally Posted by theaceofspades View Post
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  14. #14 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
    GT Level Member blownGP's Avatar
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    Quote Originally Posted by theaceofspades View Post
    You can't tune an 08 period to end
    Why? Also I have no cat and no CEL
    2000 2500 Chevy with 6 inch lift build thread- http://www.gmt400.com/forum/showthre...d-Crew-Cab-454 2006 Grand Prix supercharged build thread- http://www.grandprixforums.net/blown...ead-82585.html
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  15. #15 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Because you can't. I already said why, year only computer with can bus.

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  16. #16 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by Fivefingerdeathpunch View Post
    Because you can't. I already said why, year only computer with can bus.
    This it's been reiterated
    Quote Originally Posted by theaceofspades View Post
    I now own a stance car parts I just like them DICKS
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  17. #17 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by Below Average Joe View Post
    Youtube it.

    https://www.youtube.com/watch?v=KnYUHwTxKkE

    This will get you started.
    Thanks!
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  18. #18 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by Fivefingerdeathpunch View Post
    Because you can't. I already said why, year only computer with can bus.
    Please forgive my ignorance, but can you explain what "year only computer with can bus" mean?
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  19. #19 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by mcdavidhome View Post
    Please forgive my ignorance, but can you explain what "year only computer with can bus" mean?
    It's a locked down pcm
    Quote Originally Posted by theaceofspades View Post
    I now own a stance car parts I just like them DICKS
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  20. #20 Re: Will removing the catalytic converter make the 08 models burn more gas?? 
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    Quote Originally Posted by theaceofspades View Post
    It's a locked down pcm
    Thanks!
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