this morning my camaro wouldnt start, it would crank over just fine though but thefirst thing i did was test the fuel pressure and when i turned the key to on it read 50 psi, the manual says it should be 55-60, i tried to start it and it started up finally and it was fluttering from 58-60 psi ? what the heck is going on could it be a clogged filter or a bad fuel pressure regulator? any ideas appreciated thanks