i'm not a mechanical expert, so not entirely sure what all those abbreviations are, haha. boy i feel stupid.

i will have it checked for a leak--but again, the smell of the exhaust outright is much worse than any vehicle i've ever owned--and i've owned several with some bad exhaust leaks. drove it into the office this morning--felt vibrant and alive when i got into it, and after a 20 minute drive, i have a headache and feel sick to my stomach.

based on what was just said, not sure if this plays into things: previous owner bypassed the fuel relay on the ecm and it simply has an under-dash fuel kill switch.

all that said, what exactly is it that gets adjusted or replaced when the idle runs that high (it doesn't really vary. it's right around 1200 from when it starts and never changes much.