I am having some real issues with my car lately and can not afford to take it to a Lexus mechanic. Can someone please help me? The codes I am getting are,PO300/multiple misfire detected-PO302 Misfire detected (cylinder 2)-PO304/Misfire detected (cylinder 4)-PO306 Misfire detected (cylinder 6)-PO171 System too lean (bank 1)-PO330 Knock sensor 2 CKT Malfunction-P1354 Description not available. The gas mileage is terrible, (175 miles on a tank of gas), the car stalls while driving and seems to be coasting then picks up again. It will sometimes do that 6 times within a mile. Other times it has no power and will only go 0-5 miles an hour. My timing belt was replaced last summer along with new uridium spark pulgs, new 02 sensors,A arms with new bushings were replaced then too and need to be replaced again. The front end sounds like it is trying to fall off. It has 156 K miles on it and I was hopeing to get that much more out of it. When I got divorced, I bought a car that I thought would last me for a long time since my mechanic (my ex-husband) was no longer available. I have purchased a fuel filter and need to know where it is and how to replace it please. I thought that would be a good place to start. Also, when it is idoling the car gives itself 11% throttle with no one on the gas. It smells like turpentine. Help ? Please !!!