decat and down pipe making car run rough

[dave o]

just a d cat pipe and down pipe on my mk 3 ibiza cupra custom code stage one ruining fmic,jetex system,forge tip,green cotton filter,forge 007p,since i had d cat pipe and down pipe on car started runing abit rough.will i need stage two remap on it to run right?

 

[DOLBY]

i think with the custom code ph2 map they do a lambda sensor defeat if you have a decat

 

[dave o]

cheers mate it was ok when it was cold until it got hot then it ran crap then it put the engine mangment light on

 

[m0rk]

I bet the lambda probe is disconnected / not fitted / broken