I have a 1999 mercury tracer that died when I was going up a hill and now it won't start. Before it died some of the problems i had were when going up hill it would chug and i could have the pedal all the way to the floor. While driving sometimes it chug like it was going to die but never did. Now when i tried to start it it cranks like it wants to start but it doesn't. I don't know that this matters but the day it died on me the gas gauge is stuck at a half of tank. Is it the idle control valve think that is what it is called?