I replaced the head gasket, exhaust manifold, timing belt and pulley. I had it 5 days with battery disconnected. After putting it together and double checked the timing marks..everything OK, the engine don't crank. It's turning, but not running. It looks like it's not giving the gas. Can it be because the computer was out of power for so long? Do i need reset? Anybody can help? Thank you.

 

are you sure the battery still has enough juice ? older batteries can go dead in 5 days time without the car running. check the charge. also i dont think its the comp as i replaced a comp in another one of my cars with one from a junk yard and it started right up. but all cars are dif i guess and this may not be the same case. good luck.