cat swap for decat... ecu adjusting?

[benmanc]

If you swap cat out for a decat..

How long does it take for the ECU to adjust?

Can that affect the sound i.e. the petrol/air changes

Think this might be the reason for why my car was sounding top at first when new exhaust was fitted and then now its gone quiet and crappy.

[dom]

It'll adjust pretty quickly and I highly doubt it will be responsible for a change in noise.

Have you checked for blows in the joins? None of the hangers are touching a heat shield or anything?

[benmanc]

All seems fine. Its really doing my head in now and want to get to the bottom of it