Im just wondering if this is normal. I installed a turbo back exhaust last weekend, 3 inch down pipe, milspec high flow cat, 3 inch cat back.

I expected the check engine light to come on right away after the install because of the 02 sensor, but it didn't come on. after driving the car probably over 50 miles the check engine light came on, is this from the 02 sensor?

 

My TBE came with the extender for the O2.

You will have to do the same so the O2 reads correctly. The CEL does not always come on right away. My understanding is hat it has to see the code so many times before the CEL is thrown.
It might take several miles before you ever get a CEL possibly 15-50 or so.

 

Try this.

https://www.evolutionm.net/forums/ev...ouler-how.html

Working so far for me.

 

The code should read: "secondary O2 sensor insufficiency".

You need one of these:



Mine came with my TBE, but you can contact Speed Element and see if they have any extras..

 

you can also disable the rear o2 with the tephra rom

 

o2 bung extender

 

This.

The spark plug anti-fouler mod only works for so long.
Might as well do it right with the Tephra ROM.

 

Thanks every one!

yeah i was planing on just doing this, evoscan will work for this right?

 

Nope, you'll need EcuFlash.

 

+1 although this method doesn't exactly work for everyone.

 

this worked for me too.

 

It'll only work for so long. About 20k miles for me.

 

like they said. spark plug non foulers. its cheap and works great. that same thing happened to me too. just put one of the non foulers on if you still have the hfc. 2 for test pipe. cel never showed again.

 

Thanks every one, i did some reseach and i think im going to just shut it off with ECUFlash.

 

Will I get a light with just a cat back system?