New to this posting. I have a 98 2500 v-19 and 4WD. altitude here is 7100ft. when in Phx like 1000ft or so it flys... sounds like an O2 sensor?? also i ahve the same problem as other people. I don't see any discoloration in the oil. I can't find any leaks. So i guess that means a head gasket or would it be new heads? any ideas would be appreciated
