So my friend helped me check the cel code and it flashed 4 long and 3 short on the dash. So 43 in a list I found was fuel delivery system. I havent really noticed any problems other than that I get shitty gas mileage (24-27) but I always assumed that was just my driving. So what you guys think? I just hit 110K and it needs a tune up. My friend suggested the fuel filter but he doesnt know if that would throw a code.