I own a 98 subaru outback. The head gaskets went so me and my buddy pulled the motor and replaced them and dropped it back in. Car starts fine but has small misfire. Im not worried bout the misfire what im worried bout is that when the car is in park and neutral she revs fine. When shes in R,D,3,2,1 with the pedal pushed down to the floor she crawls literally, until she hits 3500 rpm then she has all the power throughout the rest of the powerband, then when she shifts and drops under 3500 rpm she does the same thing.