I'd have to say it was a Dodge Aspen. There was a carburetor problem that I could never figure out no matter how much I worked on it. The car had great power but when I floored it from a dead stop, it would sputter and die.
I used to have a Plymouth Horizon TC3 that ATE the gasket from under the carburetor. I could never get it fixed after that. It would run great for a few hours and then it would sputter and die. If I held the accelerator to the floor it may run at 35 MPH. I don't know what happened to it but it was a lemon from day one. Pretty little sports car but a LEMON!