Bought a pd170 2.0 2009 leon the other week and it’s got a few issues I’ve noticed, turbo needs replaced I think. Car is running weirdly now not sure if it was happening before but Everytime I start the car it’s at like 650-700 revs, when I let it sit it stays at that, now Everytime I drive for like 2 minutes and stop the revs stay at 900 for like 2 minutes then drop back down to its usual revs? Is this normal? It had a gutted dpf but no idea if it’s been properly mapped in.