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Old 10-18-2012, 03:19 PM   #1
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No cel after header install

What's the longest someone has gone before their cel turned on after a header install. I've driven about 270 miles since I installed mine and it hasn't popped a code yet.
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Old 10-18-2012, 03:23 PM   #2
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270 miles already? I would imagine it would come on any time now if it's already been that long. Took me under 100 miles for mine to turn on.
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Old 10-18-2012, 03:38 PM   #3
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I was at ~85 miles when it came on after my HFC install.
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Old 10-18-2012, 03:43 PM   #4
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all of 2 min
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Old 10-18-2012, 03:58 PM   #5
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I wonder if this could be why my car idles like its retarded...
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Old 10-18-2012, 04:08 PM   #6
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Is there something wrong or im i just extremely lucky? I did buy my ss used but I really don't think the previous owner tuned it.
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Old 10-18-2012, 04:51 PM   #7
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Lucky or it has already been tuned out.

I helped someone put on some headers and he went a while without the CEL. Can't remember how long but he eventually a tune.

It's not completely unheard of to not get a CEL for a while but it could happen just about any time. If you don't care about drivetrain warranyt at this time but I would just go ahead and tune.
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Old 10-18-2012, 05:27 PM   #8
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I drove for a few months (1k+ miles) before my CEL came on after headers.
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Old 10-18-2012, 05:33 PM   #9
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It came on as I was taking it off the lift, so you're doing pretty good to have it stay off for that long.
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Old 10-18-2012, 05:42 PM   #10
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I want to say colder weather usually likes to help set them off too. So get ready.
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Old 10-18-2012, 05:46 PM   #11
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I went several months without one. It eventually came on though. And at the time the car was a DD. When it came inspection time I just disconnected a battery cable for a little over 30 mins and it went off. It's not a DD anymore, but a couple months later still no light
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Old 10-18-2012, 06:27 PM   #12
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Quote:
Originally Posted by caverman View Post
Lucky or it has already been tuned out.

I helped someone put on some headers and he went a while without the CEL. Can't remember how long but he eventually a tune.

It's not completely unheard of to not get a CEL for a while but it could happen just about any time. If you don't care about drivetrain warranyt at this time but I would just go ahead and tune.
Eventually I'm take the car to rdp Motorsport in ohio to get the car tuned and dyno.
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Old 10-19-2012, 08:51 AM   #13
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seems like it will come on after idleing awhile, or after running it hard followed by driving in lower rpm's
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Old 10-19-2012, 08:52 AM   #14
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Mine was off for about 3 months also! Daily driver too, it willl come on any time now.
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