So happy with my 159. Such a nice place to be but i seem to have a problem when the turbo comes on boost.
Its got a K&N filter on her, and aftermarket exhaust from manifold to back box, so she's a little noisy when you step on the loud peddle... but at first i thought i'd a cracked turbo pipe. Loud woosh kinda noise
Have had it up on the ramp, pressure tests, pipes good etc etc no issues. Test drive after cleaning all the sensors and she pulled like a train (I get an intermittent engine mgt code for the lamb sensor, think this is to do with the exhaust being non standard - plug her in, clear off and no worries).
Problem fixed... nope.
Sometime the boost comes on so strong then other times its like nothing.
Any ideas because i'm running out of them.
New air filter?
Turbo seems fine
Clutch slipping? Really don't think its this
Had a full service a few months ago at Autolusso, gear box oil, engine oil, plugs etc