i got exhaust questions

**Semperfiws6** · 01-25-2007, 03:26 PM

my check engine light just came on. the code says its either the o2 sensor or the catalytic converter (bank 2). heres my question; if i take out the cat and run straight pipes, eliminating the o2 sensor(s), will the check engine light come back on after it is cleared? anybody know for sure? thanks.

**Bandit1** · 01-25-2007, 03:43 PM

the ses light will stay on unless u put in o2 sims

**Semperfiws6** · 01-25-2007, 03:52 PM

what are o2 sims? where do i get them and how are they installed?

**Bandit1** · 01-25-2007, 03:56 PM

u can get em from any of our sponsers an o2 simulator replaces the rear o2 sensors it tells the computer ur cats r workin properly when in fact u dont have cats

**Semperfiws6** · 01-25-2007, 03:59 PM

so the connector for the o2 sensor is still there, just with an o2 sim plugged into it?

**2001NBMZ28** · 01-25-2007, 04:15 PM

Yes, the 02 sims tell the PCM nothing's wrong. I'd delete both cats not just one, you can get 02 sims or just have the codes turned off. Maybe the P0430 is because the cat is clogged????

**Semperfiws6** · 01-27-2007, 02:53 PM

i think bank 2 is the passenger side exhaust. anyone know for sure?

**Mr. Luos** · 01-27-2007, 02:54 PM

Originally Posted by Bandit1

the ses light will stay on unless u put in o2 sims

Screw sims.
Find a shop that can turn the code off via HPT, LS1Edit, EFILive, etc...
Cheaper in most cases.

Originally Posted by Semperfiws6

i think bank 2 is the passenger side exhaust. anyone know for sure?

Bank 2 is passenger.
Is it sensor 2?

**2001NBMZ28** · 01-27-2007, 03:25 PM

P0430 is passenger side (Bank 2, Sensor 2), P0420 is drivers side (Bank 1, Sensor 2).

**blue02Z** · 01-27-2007, 04:10 PM

you also have bank 1 or 2 with sensor 1 for the pre-cat sensor

**sscamaro1384** · 03-11-2007, 12:02 PM

i have a 98 ss with gutted cats and a single to dual system w/ no muffler and was thinking of adding the borla muffler instead of the straight through exhaust. my question is if i will gain or lose a good amount of power? also i dont have o2 simms but the car does run pretty strong, i was told o2 simms will improve the performance and keep my ses light off? any info?

**blue02Z** · 03-11-2007, 02:06 PM

Originally Posted by sscamaro1384

i have a 98 ss with gutted cats and a single to dual system w/ no muffler and was thinking of adding the borla muffler instead of the straight through exhaust. my question is if i will gain or lose a good amount of power? also i dont have o2 simms but the car does run pretty strong, i was told o2 simms will improve the performance and keep my ses light off? any info?

as far as power, proly nothing noticeable with the muffler swap. but o2 sims will keep off the SES light and proly make it run alittle smoother. i've got them on my car.

**sscamaro1384** · 03-11-2007, 05:12 PM

ive heard that with no muffler and gutted cats, there is no backpressure and i may be losing low end torque. i just dont wanna put the borla on and wish i didn't . thanks for the info.

**juiced99ws6** · 03-11-2007, 05:47 PM

go with a pair of dynomax bullet mufflers. wont quite you down much at all and will still offer a little back pressure and refine the exhaust a little