my jeep is a 1995 and i have two of these wonderful jeeps but for some reason this one in cylinder 2 has really bad compression and it also does not stay when being tested it quickly decreases in compression. but only one cylinder, please help. i replaced all ignition coil and all sensors. also there is a new head gasket and valve stems and seals. and another things it does not want to stay running. it runs really rough and won't accelerate anymore. when i press the gas it shakes the jeep.