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      11-08-2011, 08:41 PM   #1
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Tunes for CEL a problem?

I was wondering how you guys with no cats and a tune to eliminate the CEL get by if something actually happens that normally would trigger a legit CEL such as a misfire or basically anything in the valvetrain that would change air/fuel and ultimately exhaust mix?

Doesn't this pose a potential problem of not knowing a problem is happening until its too late or more damage is done?
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      11-08-2011, 08:54 PM   #2
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A good tune only turns off the rear O2, not the CEL light in total.
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      11-08-2011, 09:04 PM   #3
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Quote:
Originally Posted by BMWJ View Post
A good tune only turns off the rear O2, not the CEL light in total.
^^^^^^^^^^

Exactly. That is why you will fail an OBD-II test because you will not pass the readiness test.
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      11-08-2011, 09:09 PM   #4
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Ok really good to know as I have been wondering how that works
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      11-08-2011, 09:11 PM   #5
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Quote:
Originally Posted by KennyPowers View Post
Quote:
Originally Posted by BMWJ View Post
A good tune only turns off the rear O2, not the CEL light in total.
^^^^^^^^^^

Exactly. That is why you will fail an OBD-II test because you will not pass the readiness test.
Exactly. Ours does the same but the light is still active for other issues. Still I see where the OP is going but can't see a solution off hand.
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