02 sensor after cat

[blackfbird98]

hi my question is i have a 2002 y87 firebird and unlike my 98 bird i used to have the o2 sensor in 02 is after my cat, if i removed the cat and straight piped it would an o2 emulator be more likely to succeed in making the car run right? or is there another way i could run the car without the cat without buying an emulator?

[ssms5411]

Re: 02 sensor after cat

If you straight pipped it, you would need the simulator for the one O2 after the Cat or you would get a SES light code.

[kristen]

Re: 02 sensor after cat

no there is nothing else you can do. it's a stright pipe or high flow cat. both will pull codes. but the o2 sim works perfect

[blackfbird98]

Re: 02 sensor after cat

ok so knowing that it will pull a code, if i buy the o2 sim will it be hard to install?

[kristen]

Re: 02 sensor after cat

takes all of 2 seconds to put on. all you have to do is unclip the o2 sensor and plug the sim in. then just find a way to zip tip it up or something.

[RadRacer]

Re: 02 sensor after cat

If you don't mind seeing your SES light, then the sim isn't even needed. Car will run fine without it, just throw a code saying your Cat isn't working right.

[kristen]

Re: 02 sensor after cat

true, but if you go in for inspection you can fail

[blackfbird98]

Re: 02 sensor after cat

If you don't mind seeing your SES light, then the sim isn't even needed. Car will run fine without it, just throw a code saying your Cat isn't working right.

when i had my 98 i took the exhaust off from the headers and it ran rich wouldnt rev past 2 grand

[bigbrian442]

Re: 02 sensor after cat

The post CAT O2 sensor does nothing to how the engine runs, It monitor's converter efficiency. That's it.

[borispeed]

Re: 02 sensor after cat

true, but if you go in for inspection you can fail

My car showed SES because had a leak in the conection between the EGR hose and the headers. I put some black paper gasket and that did not turn off the SES, but stop temporary the leak. I took the car to the inspection and it passed. Ah!, although having headers and an off-road catalyc, it passed the test. Maybe it passed because I have a muffler with packing material that absorbs excesive noise.