1993 Honda Civic civic cranks but wont fire or start

i am having difficulty finding the problem to my car. 3 months ago i park it in the back of my house. i never turn it on so 3 months later i tried to turn the ignition on and the car wont start. i brought a new battery and starter. it still wont start. i change the alternator belt, distributor, ignition rotor, ignition wire harness, and ignition cap. it still wont start. i then check the gas line in the front of the car and it seem like working fine. when i press on the gas it the gas line pumps. i check the spark plugs and it do have sparks. the motor clanks but wont start. also when i tried to turn on the car the motor shakes. could it be the fuel injector thats not working? what else can i check.