alright, i'm looking at getting a beater and I have a few questions. Keep in mind that I'm a domestic guy and know nothing about civics. So today I went a test drove a car, fired up, sounded nice, engine sounded smooth. Pulled the oil cap and the valve train wasnt ticking or anything. When I took it out for a drive, i noticed the idle was like 1500 rpms. I attributed this to the car still being cold, but I dont know if this is normal. Second, when I would let off the gas and it down shifted, it jerked a little bit. I'm a manual guy, and this may be normal, but i figured that it would be smoother. Lastly, when I parked it the idle went way up, like 2,000 plus, and then I gave it a little gas and it came back down, then started jumping back up and falling, untill eventually staying at like 2500 rpms. this is a 4dr civic lx with 126,000 miles on it. Is this stuff going to be a pain down the line?