I have the same model of car.

What do you get for gas mileage? I get 18mpg on a US gal. Seems low but it is a heavy car.

Have you ever adjusted your idle? I did it by turning a rather large screw located on a metal tube that extends forward off the motor on the right hand side as you look from the front of the car. Seems like the idle should adjust from the carb but can not locate such a screw there.

Thanks for any help

Dan