I purchased an 01 1.8t b5 last November. The misfire codes are driving me crazy. I have installed new coil packs, a new maf, new fuel filter, new platinum plugs, had compression test, and smoke tested the vacuum lines. It still shows misfires on cylinders 1&3 as well as running lean. Compression is 125 on all cylinders. Last mechanic said fuel pressure is at 70 and should be 50. He said injectors were clogged. Also idles rough sporadically. I have run two tanks of chevron injector cleaner. I need help before I trade this in for a Volvo.