yesterday,fill full tank and after red ligt step on pedal and...... bycicle speed+power.after pumping pedal couple times,everything look normal,get to office,shuted down,started again back home no problems.in the morning cranking car trying to start but dies immediatelly.fuses,relays checked ok,fuel pump at the end of rail 50 psi(normal?),engine compression checked ok,spark good,replaced cam sensor as is acts same its connected or not...still will not start-run.get code p0452 once,but after clearing it not comming again.if spray starting fluid it will start and run as long as you sprayin.29600 miles.any ideas?thanks