ok so i have a 2000 x with the 5.0 in it. a few weeks ago it start idling ruff, and the cel came on. i started checking some stuff, and found if i unhooked the maf sensor it would start idling better hust at a higher rpm. so i put a new maf in it, but wasnt the problem. so i hook it up to my buddys computer and it tells me the left bank is running lean. i start looking around for an air leak of some sort, and find i have a leak in the egr valve. but im having some problems getting it off any advice on getting it off.