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Check engine light on after exhaust install!!

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Check engine light on after exhaust install!!
Old December 8th, 2012, 11:43 PM   #1
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Check engine light on after exhaust install!!

Just installed corsa with high flow cats on my 99 gts. Drove it for a while and the check engine light clicked on?!?!?! Weird that it didn't throw the code initially.... How do I resolve?
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Old December 8th, 2012, 11:50 PM   #2
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Did you read the code to make sure it's associated to the cats? Whos Hi Flows are you using? Most Hi Flows will not set the code unless they have low cell #s in the cat. I would do foulers.
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Old December 9th, 2012, 07:10 AM   #3
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...it's all guesses until we know what the code is.
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Old December 9th, 2012, 07:42 AM   #4
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Step away from the car...
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Old December 9th, 2012, 08:06 AM   #5
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It's the dreaded 'owner is a dumbass' code.
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Old December 9th, 2012, 08:16 AM   #6
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OP: re: above: you posted on the wrong forum. This is not the place for you to get help with your Viper.

First step is to go to Autozone or O'Reiley's and find out whether the code is an O2 sensor code. I never got codes on my car with Random Tech cats and Corsa; but, I hear that it depends on how you drive the car, also.
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Old December 9th, 2012, 08:19 AM   #7
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it could have been the front tire pressure sensor. when you change the cats, sometimes that happens.
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Old December 9th, 2012, 08:29 AM   #8
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I got a code when I changed the wiper blades last spring. It was the no rain here code, and cleared itself.
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Old December 9th, 2012, 08:42 AM   #9
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I think the "how u drive it" holds true. Must be from getting in the throttle and the O2's flagged the increased volume of exhaust.... I'll clear the code and see what happens. Thanks alley.
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Old December 9th, 2012, 08:56 AM   #10
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Originally Posted by Z0SICK View Post
I think the "how u drive it" holds true. Must be from getting in the throttle and the O2's flagged the increased volume of exhaust.... I'll clear the code and see what happens. Thanks alley.


You must have Dave's tune.
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Old December 9th, 2012, 09:07 AM   #11
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Originally Posted by Z0SICK View Post
I think the "how u drive it" holds true. Must be from getting in the throttle and the O2's flagged the increased volume of exhaust.... I'll clear the code and see what happens. Thanks alley.
Probably running rich, maybe a bad upstream o2. I have a blower and high flows..no check engine light.
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Old December 9th, 2012, 09:10 AM   #12
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I've got the TIY system. No codes.
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Old December 9th, 2012, 09:37 AM   #13
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They should change the little yellow CEL lighted icon, to a text message that says get the code read FIRST, and THEN ask everyone on the forums how to fix it.

Summary: We have limits.
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Old December 9th, 2012, 10:09 AM   #14
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Get a '96... it doesn't give a fuck what you do.
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Old December 9th, 2012, 10:19 AM   #15
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Wouldn't hurt to invest in a SCT tuner (if you can still find one). You can get rid of the skip shift, turn off codes, tune the car, etc. My car has a SCT and it's been used to do all of the above.
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Old December 9th, 2012, 11:20 AM   #16
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Get a '96... it doesn't give a fuck what you do.
Or a 97. 98 and later started using rear O2 sensors and I bet that is your problem. Cat might not be efficient enough. Just by O2 sims and install and your good to go.
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Old December 9th, 2012, 11:52 AM   #17
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I have a set of Roe Racing O2 simulators I'd be willing to part with.
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Old December 9th, 2012, 03:21 PM   #18
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Just cleared the code! it was something like o2 bank 2 which I think meant passenger rear O2. Just cleared it ( cats weren't efficient enough at full throttle) anyways for those whom were helpful thanks.
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Old December 9th, 2012, 03:49 PM   #19
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Just cleared the code! it was something like o2 bank 2 which I think meant passenger rear O2. Just cleared it ( cats weren't efficient enough at full throttle) anyways for those whom were helpful thanks, the rest of you can go suck a bag of dicks.

Well said.
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Old December 9th, 2012, 08:26 PM   #20
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Double post. There's already an alley dick thread.
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