Sorry this is gonna be long and its my first post... 2003 infiniti g35 coupe 6 speed m/t
Brother in law had the car towed to me and gave me the keys, said its my headache now. His issues were No start, Stalling, and gas leaking....

Got the car started same night reving high
Opened the throttle body next day and found a zip tie keeping the flap open, reving normal after but still intermittent shut off and intermittent start
Car has Vortech supercharger, headers, and borla exhaust catback.
He said he changed the fuel pump but aftermarket so I bought oem from infiniti yet still intermittent start so i worked on what i know was broken the leak. Maybe no fuel pressure??? patched it up and filled the car, no more leak... Finally it threw cam sensor code and crank sensor code changed them too oem except I went with denso for crankshaft. Still issues with stalling and starting, So I looked at the vortech wiring and saw that one of the wires going to camshaft was loose and somewhat broken so i fixed that. Mind you no more check engine light. Still same problem with intermittent issues. I noticed that there the fuel pump would randomly prime about 12-15 seconds instead of 3-5 so looked online and maybe still the fuel pressure so I changed the fuel pressure regulator and the damper still intermittent start and sometimes stall. Then it threw a crankshaft error so 2 days ago I went to infiniti to get oem and changed it. Still the same issue but realized that it only happens at night when car engine is hella cold and same in the morning. As soon as I get it started and warmed up its good for the whole day until I park the damn thing and engine gets cold. Sometimes if I wait long enough after trying to start it, it will start or if I really need it to start then I pop the clutch.... I really like the car when its running but am about to part it out at least to get the money I spent on it. Another thing is no regular mechanic want to touch it cuz of the supercharger. I don't have the money to take it to a specialist and even when my bro in law took it to nissan/infiniti specialist they couldn't get the car started.... Checked all fuses and relay as well and changed most of the relay even if they were good.... Any Ideas or help anyone can give me would be greatly appreciated....