Okay heres whats going on... I have a 93 manual ls When sitting at a light my car idles at 750 maybe a little higher. then it drops to about 500 or lower and in some cases it stalls unless i rev the engine to over 1k for a second. I dont know what the problem is, but it doesnt stop there. On acceleration the car drops in rpm and bucks like it does if you drop the clutch and its about to stall out. It does this only in low rpm. Also when starting up it takes a little to turn over sometimes and sputters during first rev. There is no check engine light triggered it has coolant and the oil isnt low. What do you think it is?