.I don't understand how people can make something as easy as checking compression in an engine so difficult. Pull the green or black wire going to the ignition module on the drivers side fender off. Turn the car over, does it sound even? If it does, then you have the compression in all cylinders. If you sucked a valve, you would not have made it home. I'll bet you it is just a tune problem, or you have a bad injector.