[scymatical]

I’m having a issue with my car making no boost. It’s throwing no codes not going into limp mode nothing. I have done a smoke test and I don’t seem to have any leaks I’m wondering if the boost solenoids can cause a issue like this and not have codes

[TomE90320D]

What engine is it is it an N47 and is the problem intermittent because I had the same problem in my e90 320d it intermittently used to have no power/boost and very occasionally throw up an engine management light but had no codes and couldn't find any obvious issues but after doing some long journeys and using good fuel either shell vpower diesel or bp ultimate and giving it a good thrashing touch wood I've had no more issues think it may have possibly been a stuck EGR or turbo veins

[scymatical]

N54 engine I’m leaning towards one of the turbos being seized. You can hear the turbo spool and the blow off is very weak