im back. i took your advice and sprayed carb cleaner around the throttle area, and on and around the hoses and seals. I'll admit, the engine did stumble just a bit, but my neighbor came over and told me to spray the cleaner directly onto the throttle plate, to clean any gook that may have settled there. I did, and the car improved 85% ! I still feel an ever so slight shaking after i downshift and come to a stop, even with the clutch in. This simptom is very very mild now, that the throttle plate may have become stuck, but is now clean.

On the same note, i checked the hoses and not one of them appeared damaged/broken/not connected properly. how do i know which one needs replacing? If they do ?