Hello there, I'm new to Lexus, just got my first one a few months ago, the 2007 220d, it has about 240000km on it, but it has a slight problem. Didn't really notice it much, but when I went to get my car remapped, it was put on a dyno and it only put out 109kw(146hp) instead of 130kw(175hp). So I didn't get the car remapped because of this, only got the EGR blanked and mechanically blocked off, which barely helped it to get to 113kw(151hp). Also, the torque doesn't seem to be down, it's 391Nm. Was wondering if anyone has any ideas about what could be causing this?
Also to add to this, the car sometimes would stall while idle at 800rpms for a few minutes, and then start up roughly, but after that, it's all right. Pretty sure this tends to happen more when I do slow city driving. Also, my gas mileage seems to be down. Any ideas and help much appreciated:)