I have a 1994 ls Integra and it is running on Three Cylinders. I have changed the spark plugs, spark plug wires, and the cap and rotor and it is still doing that. it sometimes over heats also. What could it be?

PLease help me out
Thank you

 

KISS. Check to make sure you have spark to all 4 holes, yank the injector rail, crank over, and make sure all 4 injectors are firing. If you have spark and fuel there is only one thing lacking, Do a compression check.