I just installed my GReddy sp2 and in the process decided to hollow out my CAT.
Its been about 2 days and the engine light just came on.Is the from the O2 sensor goin off? since all the dick it gettin through my cat.
thanks

 

yeah most likely is the O2 sensor but u can flash the code to find out for sure

 

how do you flash the code?

 

bump

 

sounds like you have a 96 and up integra with a o2 sensor behind the cat and if you hollowed out your cat it would take a day or two for the CEL to come on ... either get a new cat or a o2 simulator and it will solve your problem

 

Do you know how to jump the little clip to see your code?

Well, regardless its probably that O2 code anyway.
You can get a new ecu to eliminate it, you can get a simulator...any number of options.

Is your car in limp mode?

 

what is limp mode?it still pulls hard if limp mode slows it down.

 

bump

 

Sounds like an O2 to me as well. Just get a simulator, or perform a check engine light search if your not satisfied with that simulator, and then refer to the ECU code thread at the top of this page.

iTR