Introduced myself a while back when I bought this 2.0 JTS as a project.
Replaced all valves etc (timing belt snapped)
Replaced clutch and concentric cylinder.
Replaced old fuel and ran injector cleaner through car.
I have replaced all wheel bearings and disks. Reconditioned the callipers. New copper brake lines fitted also.
Replaced various pulleys and fitted new timing belt kit.
New plugs. New oil etc.
Failed MOT however on emmissions : ( .......oh and one faulty windscreenwiper lol
No other advisories on MOT.
The problem is it runs rich (2.1 was the reading I think. 6x what it should be) at high revs.
runs very lean as it should on idle.
Replaced both lambda sensors and now it runs rich at idle and at high revs.....what the
MAF cleaned. Cylinder head was clean....no buildup of carbon deposits etc. There is a bit of 'white' smoke coming from exhaust when revving above 4-5000 revs.
FiatECu software is not giving any errors other than high readings for lambdas. Contacted rather unhelpful Alfa dealer and they suggested the JTS is known to have issues with air leaks which can cause this problem....then cut me off???
Any help with this would be appreciated.