I just started driving my car again after it's been off the road for a couple of months. It's been running good, but today while I was warming the car up, I noticed it sounded different. When I drove it the car was back firing and I felt like it lost a lot of power, I didn't even try to get on it because it didn't feel like it was revving right. I'm thinking maybe I have an exhaust leak since I lowered the car and the exhaust bottoms out sometimes, also I noticed once line is slowly leaking going to one of the carbs. My question is could these things be the problem? I'm thinking if it's an exhaust leak I wouldn't be loosing power right?