I have a automatic D15b engine and what is really weird is that when ever i start up the car, it really vibrates. when i try disconnecting the two inner spark plugs the car still starts. pluged the two inner spark plugs in and disconnect the two outter spark plugs. and the car doesnt start.
i figured the two inner pistions aren't bruning. is it something else maybe? or should i get a new engine? is there a solution to fix this?

 

Check whether the plugs have spark and the fuel injectors are clicking for the two "bad" cylinders. This could possibly point to bad plugs, wires, cap, and rotor or faulty fuel injectors/wires. If spark and fuel are fine, then compression test the cylinders.

Any CEL codes?