Flex Pipe

[AC]

Just installed my spoon 2-1. Running it with a HKS Silent Hi Power. The car seems ok under load however it doesn't like idling just under 900 like it used to (it dips) and sitting around 70mph the car seems to hesitate ever so slightly. (didn't do this before with the cat) Is this the ECU trying to accommodate no cat? Is this possibly a leak in the flex pipe? It sounds a bit like a turbo spool up / the manifold leaking somewhere yet all gaskets arent leaking?? :xcry: :xhelp:

 

[AC]

maybe this is lack of back box pressure now?

 

[AC]

forgot to mention i had to install a generic lamba sensor (male ended) coz i couldnt get the other one out of the cat

 

[C&S Evo7]

get the right lambda first as it should be wide band, it is very possible the fueling isnt 100% spot on

the noise is normal, sounds a bit like its blowing when at idle normally.

 

[AC]

car is running fine now. So guess the ecu has sorted it self. Got an ecu light on now but will reset later

Cheers for help