Question for smog when having a tuned car.
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This is a discussion on Question for smog when having a tuned car. within the Tuning: Electronic Engine Management forums, part of the Tech & Modifying & General Repairs category; let say car is tuned with cobb intake + invidia dp catted n when I smog, what do i need ...

  1. #1
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    Question for smog when having a tuned car.

    let say car is tuned with cobb intake + invidia dp catted n when I smog, what do i need to do? do i need to re tune it back to stock or leave it tune with intake n swap back the stock dp..


    im from California..n a nubie

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  3. #2
    Registered User Ingo's Avatar
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    If you put the original DP back in you'd be safe for both the smog-test and in terms of tune. It would probably run a bit rich and just not as good as you're used to. You would need new gaskets and can probably re-use the new one to put the "good" DP back on. From what I heard the hi-flow cat does not pass... But you could give that a try, worst case you'd still be changing back and forth afterwards for a second go.
    You can't have everything - where would you put it?

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    when i put back my invidia dp back on i dont have to tune it again right ?

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    Quote Originally Posted by darkendoom View Post
    when i put back my invidia dp back on i dont have to tune it again right ?
    Well if you get a protune that utilizes an access port you can flash stock tune for smog

    Sent from my Nexus 5 using Tapatalk

  6. #5
    Registered User Ingo's Avatar
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    My car was sold thru a dealer. For emissions they put the original DP with cat back on, didn't change the tune. Drove that for about 3 weeks before I got the open DP (invidia) and installed that. Tune was never changed, the car had no issues - other than an overboost after the open DP went back on and I didn't wait for the ECU to learn...
    You can't have everything - where would you put it?

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