I had a problem with crossfire a few weeks ago and had the stealership run the codes for me. They said it was the fuel pump....so I put it in myself along with a new filter and cps. Also fixed the rcm..... so it cranks over but engine will not start....I'm thinkng its the battery under the hood...not in the key...red light on the fob lights up just fine..and keyless is fine also....I'm just stumped with this one!!