emissions question

[camarocrzy]

I was wondering what to do with my flowmaster cat-back as far as emissions, meaning do i have to get an o2 sensor bung welded on for emissions? Or can i just use the Sim and pass emissions? What did everyone else do?

[derkyboy187]

with just a cat back you wont have to worry about emissions or an o2 sensor

[grayman]

is your new setup setting off the SES light in the dash. If not you are golden.

Or, if I read your post more specificaly...you dont currently have a rear O2 sensor at all?

if so you will need a sim ofr OBD2 tsting state. A few states inspect car visually...don't want things like disabled senors obviously hanging down un used and stuf.

[grayman]

Originally posted by grayman:
is your new setup setting off the SES light in the dash. If not you are golden.

Or, if I read your post more specificaly...you dont currently have a rear O2 sensor at all?

if so you will need a sim if your state does OBD2 testing. A few states inspect car visually...don't want things like disabled sesnors obviously hanging down un used and stuf.

[camarocrzy]

i just got my cat-back a few days ago and i am gonna have it put on monday. What i was trying to say is, can i just use an o2 sim or am i gonna have to have the shop that installs it to put a bung in and still use my o2 sensor?

[FireFighter]

The shop will have to put a bung in if your catback doesn't have one to use your o2 sensor. If you have nothing else done a sim is pointless.

[camarocrzy]

So what your saying is i should just ignore the ses light that ill get when i put my new Catco on?

[ellik]

I run a sim. never put a post cat bung in. PA emissions (at leat Allegheny and Philadelphia counties so far) are based solely on SES lights. As long as you dont throw a code, you will pass. You WILL throw a code if you dont have either a post cat sensor or sim. For our cars its hit and miss with high flow cats as to wether of not it throws a code.