I got my hands on the Chrysler FSM. Can't say as it has helped me all that much. Vehicle in question is a 1984 Plymouth Reliant with the Mitsubishi
2.6L engine. As best I can tell (although the pictures in the FSM still don't quite match), the car is equipped with the "feedback" type Mikuni carburetor. There is a throttle position sensor on the carb, which the non-feedback type does not seem to have. Fresh fuel helped somewhat with the dieseling, but when fully warmed up, it will still diesel when shut off.Connecting a tachometer to the engine shows it idling around 2000 RPM.
Sometimes the car will start and idle nicely for a brief period of time, maybe a few seconds. Then it throttles up and takes off.
I'm running thin on ideas. Can anyone help? Thanks in advance for *any* answers, suggestions, thoughts, etc...
William