Car is running really bad again. After i changed the fuel filter the car ran normal for a couple of days, then started doing it's thing again. CEL comes on when just cruizing down the road and at idle. If u give it a little power it will clear up and run great. Sometimes it feels like it has no power on acceleration, but most of the time it will clear up. At idle it sounds like a 4 cylinder. Also at slow speeds when u let off the gas the power steering feels like it is binding, like the engine is not turning fast enough. Then all of a sudden it will run great for a day, but go back to running bad. Also my mpg is down by at least 2. Went and changed the fuel filter again, but no help. It seems to be fuel related. I changed MAF with my 540/a, no difference. Anyone have a idea?