re:cleaning uim
when loosening the bolts on the uim,there is a sequence you have to follow,try to put the bolts back in the holes they came out of.when re-installing them , there is also a proper sequence.I had someone remove mine and clean it ,and the uim didn't seat right and it threw a code. there's a vacuum leak ,and I have to re-do it. Consult a manual for the correct sequence ,unless there 's a thread on it on here.