Hey - This is bizarre problem. My daughter's Civic was running perfectly fine until she backed into a hillside and plugged the tailpipe with dirt. Naturally, the engine died; she cranked it and cranked it but it didn't run (she didn't know T/P was full of dirt). She came in the house and got me, I went out and found the dirt issue, cleaned it out, but engine has not run since. I began some troubleshooting and I have spark on all 4 and fuel gushes out of fuel line when cranking. Found compression on cyl 1 and 2 at only 30#. Haven't checked other two yet, but I'm sure this is a problem. Timing is correct, distributor, rotor, plugs and wires are brand new (4 weeks). Anyone heard of blowing a head gasket (or worse!) by trying to crank the motor with tailpipe plugged? Or did I trip some relay that is preventing injectors from firing? No DTC codes, by the way.