Why am I throwing a Cel???

[StreakinOraNgeX]

I got my j pipe back exhaust done about four days ago with hi flow cat and recently it's throwin a check engine light. Why is it doing this, is it because of my exhaust? I thought it shouldn't throw one since I have a cat on. If so, how do I fix it?

[dominoy2k1]

get the code read. it might be something not related to the exhaust. autozone checks em for free.

[Striker187]

duck under your car real quick and look for the 2nd o2 sensor....is it before or after the cat? cause it should be after.

[StreakinOraNgeX]

damn, I m pretty sure you can't see the o2 sensors without jacking up the car a lil bit. I am correct thought, with a hif flow cat, it shouldn't throw a cel right?

[Striker187]

so long as your o2 sensor is in the right place. you should be able to see the 2nd o2 sensor no problem.

[StreakinOraNgeX]

Yeah your right stryke, the o2 sensor is mounted about 7 inches away from the j pipe where the first cat used to sit. Not after the hi flow cat.

[t3ase]

MIL eliminator.

[t3ase]

http://www.apexr1.com/mamilelcfi.html

[StreakinOraNgeX]

http://www.apexr1.com/mamilelcfi.htmlso my custom exhaust shop couldn't remount it? I need to get the mil eliminator?

[t3ase]

so my custom exhaust shop couldn't remount it? I need to get the mil eliminator?
They could I guess however, personally, I'd just install the fix. I'm thinking it'll be much more work for them to close the current bung, weld a new one, attach it, etc. Your choice though.

[Striker187]

i'd at least let your exhaust shop know they screwed up....prolly isn't the first time they've done that