Can anyone help me with symptoms of a blown head gasket??? I had my carb rebuilt and in the process found out that the TPS was broken. It idled really rough but was drivable once it was warm. I have only driven it once while waiting for a new TPS in the mail.(about a 50 mile round trip). I have noticed no overheating issues. Before the carb was rebuilt, the car ran extremely rich and chugged black smoke. Now, there is no black smoke but there seems to be alot of moisture coming out of the tailpipes. I don't really notice a sweet smell coming from the exhaust and I haven't been to the garage yet to check for coolant on the oil. The car is an 87 Cutlass with a 307 with 70,000 miles on it. Any help would be appreciated.