Recently picked up a 92 pickup V6 manual. New fuel pump, coil, wires plugs etc. There are times when I go to start it, it will crank and crank and crank and not fire. Smells like fuel but won't fire up. Typically this will happen after it has ran for a while, been shut off then you go to start again in 30 min or an hour. Cold start is typically ok. Any suggestions?