when I am running in and out of stores , my Intrepid some times will not start,, it shakes, like its not getting any fuel ( but we checked the fuel pump wile it was doing it and it was about 43 PSI) and we checked the firing as well and it was ok,,, But if I keep at it or wait for about 10 min or so it will start,,, Oh and if I shut it off and start it up right away it will work Great, and if I am driving again it works Great,,, but if its off for about 10 min or more then it may start acting up,,, Only when its warm though.