New to this Alfa owner thing but loving it so far. I have a 20v JTD that has a curious habit of popping the P0238 as do many of you on here, however slightly different to most other peoples in that if you let the car get to full operating temp (about 10 miles
) you can red line it in every gear, (well 2,3,4 - ran out of road in 5,6 but got well up) however if you stray beyond 3000rpm at anything less than full operating temp your gaurenteed to get MCSF - P0238. (is it rev's or throttle openings I wonder?)
Things I have investigated so far based on this excellent thread and others:
1. Checked VNT hoses, all good, held the input and output hoses together on VNT and enough VAC to move actuator
2. Actuator moves - do need to check smoothness of this
3. Cleaned MAP - Proper caked up
4. Changed Thermostat - was sticking all over the place
I hate spending money for fun or on "It might be this......" whims, I like to put some science behind it, and I need to do lower wishbones soonest.
My current thinking is vane clean, however defeets my logic, things grow when warm not shrink! surely it would stick more the hotter it got?
Anyone any suggestions as to possible cures? It's livable with but frustrating.