My car is acting like it wants to die, I need to know what could cause this?

Wow a year and half how did you get all the old gas out?How much old gas was in the tank?Dont tell me you just added new gas to the old gas and hoped for the best?

Did you make sure all the wires were correctly routed on the coil towers and not mixed up?That would cause a not start. Also try this after trying to start it again if your unsucessful try holding the gas pedal all the way to the floor while trying to start it. Also do you have a multimeter?I suspect you could have a bad coolant temp sensor and possible a bad connector to it. Keep me posted on what you find.