Alrighty, todays my day off and im workin on cars today. We're working on a carbed 1987 CRX DX. Cylinders 3 and 4 are firing but we dont think 1 and 2 are firing. We can pull the spark plug wires for both cylinders at the same time and it doesnt change the way the engine fires. if we pull either the third or the fourth spark plug wires, the engine dies. We did a compression test and it got 180 psi on all 4 cylinders. We verified the spark plugs are sparking (btw dont try to pull a spark plug off the wire while the engine is running). So weve verified the order is right, there is spark getting there, and there is compression. That makes me think that there is a problem with the carb or the intake. The reason i think this is you cannot smell fuel on the first 2 spark plugs and they are 100% clean. Look brand new. Anyone have an idea on what would keep those two cylinders from firing, but allow the other two to continue working. Im stumped and so is my friend and his dad. Just throw some random ideas out there and ill convey the message. I dont know enough about these carbed honda engine to have any idea whats going on. We are gonna check the valves today and just verify that the intake valves are opening properly. after that we are out of ideas.