Hey guys, having massive issues with my A3 1.8t (AUM). This is following an engine conversion from the 1.6 (AVU). Basically, it will have days where I will turn it over and it will start and idle fine but then, when it's running it's very jittery, it's as if the turbo boost is cutting in and out and it can't decide whether to go or stall, it will drive very slowly even at full revs. Alternatively, some days it will turn over all day but won't start. The fault codes I'm constantly getting on VCDS after clearing everything and trying again are as follows, I've already changed the camshaft sensor and MAP sensor so I can't see those being the problem: 4 Faults Found 16621 - Manifold Pressure / Boost Sensor (G31): Signal too Low P0237 - 35-00 - - 16490 - Manifold / Barometric Pressure Sensor (G71) / (F96): Implausible Signal P0106 - 35-00 - - 16727 - Camshaft Position Sensor (G40): Signal too High P0343 - 35-00 - - 18041 - Accelerator Position Sensor 2 (G185): Signal too Low P1633 - 35-00 - - Any help would be much appreciated, as I am at the edge of my wits over here.