i have an 08 accord with a 4cylinder engine...sometimes in the morning the car wont start when my wife goes to work..when i come home i check it and it starts right up...she says the engine cranks but dont start and dont even tey to start...the car never stalls when it is running and runs well when it is running...we had it in the shop for a week and everytime they tried to start it, it started...they checked the fuel pump and said it was good and there is no fault codes...i think im gonna change out the fuel pump relay...what do you all thing any other ideas?

 

Crank or cam sensor acting up.