I have an IS220D (2007), it loses power occasionally, I changed the fuel filter Because I suspected it as I mistakenly put petrol when I bought it, but had it drained) and had to replace a broken filter housing, at a huge cost (because it is notoriously difficult to change the fuel filter housing on the IS220D). It still loses power occasionally. I now have VSC and engine lights and a VSC warning light on! I know the EGR valve might need cleaning. Does anyone know where I can get an uprated EGR valve system? I know it might have to come with an upgraded (exhaust) manifold system. I got the Lexus very cheap, and as it is a beautiful car, I want to do it justice, but I won't be robbed by Lexus dealers. Please help guys!!