have a 2013 5.0 crew cab 45k, it wouldnt crank just kept trying with the key on wouldnt start, had it towed to dealer it sat there for 4 days wouldn't crank, dealer stated one of the techs looked at everything (fuses etc) wouldnt crank, next day called me said it was running great no idea what was wrong probably "vapor lock" omg im 50 years old there is no more vapor lock. Picked it up everything seemed fine, happened again today same thing a friend got in it started cranking and pumping the accelerator it fired big cloud of smoke but ran fine drove it home and parked it Anybody heard of this, the cause or the cure? Thanks in advance for your help