hello, i had recently changed my cat to a test pipe and now when i drive for a about 30-45 min my car will bog and it will hit 2 step at 3.5K rpm while im driving..

and then after a few more minutes a CEL will pop up, but i dont have a tool to check it and when i turn the car off it goes away, but the bogging/ 2 step issue is still there.

im thinking its my 02 sensor doing this? cause i can hear a leak i believe when i accelerate.. but im not sure why my 2 step is going on while im driving. this all started ahappening when i changed my cat to a test pipe..

im going to puit the cat back on. but im just looking for any opinions as of now. thanks

 

VSS issue, check your codes for the check engine light too.

 

thanks, that makes sense why the 2 step is acting up.. any other opinions?

 

is your car OBD II?

 

no, i have a 2000 civic ex with a b20z running obd1.

 

https://honda-tech.com/zerothread/1901557