I have a 95 honda civic. I changed the key lock cylinder and now my car only cranks and won't start, is there something I could have done wrong that would cause this? I only disconnected 3 pieces off the assembly to remove it... one wire clipped in the other 2 were connected to plastic pieces that were held on with screws, I didn't mess with the ignition wire. It worked fine before I lost the key, that is why I had to replace it. So is there something I could have done wrong to cause it to crank but won't turn over? I checked the spark plugs and there was oil in around and on them. I cleaned them out but would that cause your car not to start? I just don't know what to check or what to do.
If anyone has any idea please let me know, thanks.
TB

If you didn't disconnect the negative battery cable first, you may have blown a fuse. Check all under hood and under dash fuses with a test light or multimeter.