welcome to the forum. first off, do a tune up on the car(plugs, wires, air filter, oil change etc) clean your mass air flow sensor with specific mass air flow cleaner. as mentioned above clean/relplace idle air control valve, check for vacuum leaks. check tps (throttle position sensor) remove and clean throttle body. I read your other post and your clutch may be just fine but need adjusted. short term, you can lift up the clutch pedal and the quadrant will take up the slack in the cable. if that doesn't help then search the stickys at the top of the forum for the dogbone cable upgrade and try that. sounds like the clutch isn't fully releasing enabling you to shift without grinding the gears. small and easy steps to get your pony up and running. good luck and ask away, there are plenty of very knowledgeable ppl on here to help.