**Car sometimes wont start update**

[boogerdawg]

Ok so what I have found is that the reason my car died while running was due to my alternator fuse being blown, i replaced it, everything works perfect now as far as coming on when you start the car. But i still have the problem when the car wont start. I replaced the coolant temp sensor because my ecu was giving me that and throwin the knock sensor code. Car still wont start. I used a multi-meter and battery is good as well as my alternator. Also when trying to start the car I can smell unburned gas. Engine cranks over, but wont start sometimes. When the car does start the car runs really well, the idle is smooth and theres no hesitation at all. What could possibly be the problem??? Like I said, I have a multi-meter although I just bought it so im kind of new to checking stuff with it. Is there something i should check with this multi-meter? and if so, how exactly do i do it? Thanks