Every time I start my truck it takes a good 3 or 4 seconds for it to finally turn over. I put a cam in it and I lined up the marks on the timing gears, should I advance it one tooth or will that even make a difference? And my cam pos sensor is making my check engine light come on, does it have a better chance of just getting a tune instead of all that?

 

the cam specs should have said to run it advance or not. the computer may alos need time to learn that you changed the cam. try re-sitting the ecm.

 

Get a tune.

 

^ get a tune.

 

Yup a tune is the way to go here... a cam swap isn't even worth it without one to be honest.

 

Its a fueling issue. Valve events change the injection period greatly.

 

Fix the cam position code and you'll fix the extended crank. What did you change inside the timing cover? When the cam sensor signal is lost you lose sequential injection and are left with batch injection, meaning instead of firing the injectors in the firing order it just fires one bank and then the other, this causes the extended crank because your just relying on a cylinder to finally come around to tdc compression stroke at the right time the injector has been "batch" fired.