Hey guys, i need some help!!! A few months ago, when the temperature was really hot outside (90's) the the idle speed was zero!! the tach would actually rest on the peg at 0. then i think i changed my oil, or something, and it just went away. now, the problem is back, and again, its really hot outside. could the problem be due to the fact that i changed the dials (MUGEN INDIGLO) and that the needle is somehow rubbing? i was reading thru the other posts, and someone said that the tps is going bad, and it costs 500 to fix!! others said cleaning the throttle body works, too. how do u do that?