Truck cranking but not turning over. Runs fine if driven every day. But let a day go by will not turn over
Knowing the year, make, model, and engine size would help to come up with a better diagnosis. Typically, you are having a problem with the fuel pressure not staying up if the car is allowed to sit for too long. This could be because the fuel injectors or fuel pump is leaking. I would recommend having a certified mechanic, such as one from YourMechanic, come to your home or office to inspect the car and diagnose why your car is not turning over. From there, they will be able to come up with any repairs needed to resolve this issue.