sometimes start but after a few minutes turn off by itself,then car won't crank

What is your question?

I can't find the problem, my car sometimes start and after a few minutes it shuts off and won't start again it doesn't crank at all like a dead battery, I already bought a new battery a new alternator a new camshaft Seí±or, it's driving me crazy please somebody know what can be the problem?

How long has your 1999 Chrysler 300M had this problem?

1 month