Intermittently dies while driving, like someone just turned key off! Turns over and may start again after a few minutes to a few days! Replaced fuel pump, fuel filter and fuel relay. Also, brand new MOPAR crankshaft position sensor. Ran great for several days, then died on the road again. Took several key turns before I hear fuel pump kick on and it started up and got me home. No MIL, no codes shown. Afraid to drive it anywhere now! Any ideas on what to do next? I can't keep throwing parts into it hoping that I'll hit on the problem.