hi all, hoping someone can shed some light on this. Got the car last week with a boost shown on gauge of 0.5 bar max, usually 0.3. Car drives fine apart from the obvious lack of power. So far, it’s had a new maf, diverter valve which is the new type with o ring as opposed to the diaphragm version, I’ve cleaned the maf again anyway and also the map sensor, checked and cleaned all earths under the battery tray, measured fuel pressure on boost which is 1500psi+ and atmospheric pressure reads at 14.5 bar so is about right and there are no lights on. I unplugged the maf but it made no difference. Weirdly, it didn’t show a warning light either though which I thought odd, but is measuring airflow ok. At 0.4 bar it’s showing about 110 g/s. At full boost I know it should show 190-210 so at the lower boost, I’d imagine this to be about right. Unfortunately I no longer have a windows laptop so cannot log requested boost. I have an app but it’s showing calculated boost at 75psi so I’m guessing this car doesn’t show boost in a digital way very well with most apps. I’m tempted to try a map sensor as when the car reaches 0.5 bar and the revs climb a bit, you hear the dv open slightly and the gauge drops a bit then it closes and it climbs back etc. This cycles until you change gear or keep the revs up which in turn makes the boost drop to around 0.2. I’m guessing that it’s more or less running on actuator boost and the n75 isn’t commanding any boost, that or the new diverter was fitted wrongly by the previous owner. Not sure that’s possible though? Also blown through the pcv and it’s nit possible so that’s ok. So, any other fresh ideas anyone? To sum up, Common parts replaced as above, common failings addressed, no eml, drives fine and has fuel pressure, just next to no boost!