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| 04-10-2015, 02:53 PM | #1 |
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Catless - check engine light - how soon?
if I removed primary cats, on stock tune, how quickly would that check engine light come on? Then, if I cleared it, would it come back on fairly soon? Or is it every 4000 KM's/miles (thought I saw that somewhere)?
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| 04-10-2015, 03:06 PM | #2 |
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Captain
 
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Mine came on the next day after I installed my catless setup
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| 04-10-2015, 05:16 PM | #4 |
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Man mine came on the way home from the shop...
Dave
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| 04-10-2015, 05:44 PM | #5 | |
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| 04-10-2015, 05:56 PM | #6 |
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it depends on how you drive it. If you baby the throttle and stay at a constant speed under 3k RPM it will show up faster. If you drive more aggressively then it will take longer.
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| 04-11-2015, 12:02 AM | #7 |
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BigMacs
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^Yep. The first time I went catless, CEL came on within a few hours. Was just cruising. Later, BMW had to update my DME, so I lost my tune. Drove like an idiot the next several days. No CEL. Loaded my tune back on and all is well.
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| 04-11-2015, 12:44 AM | #8 |
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Just drive the shit out of it everywhere after you clear it, it will delay it.
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| 04-11-2015, 12:52 AM | #9 | |
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Heavy throttle fluctuations, high RPM use, and exceeding 65 MPH will delay the error from being set. Cat efficiency is mainly measured on leisurely drives w/ sufficient coasting phases.
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