94 Accord EX When the clutch is in or it's just idling in neutral. The idle will bounce up to about 1,500 Rpm and fall down to 500ish and repeat. Pumping the brakes intensifies the bouncing, and about 2 months ago would be the only reason the car ever did this. Very recently the temp gauge kept rising way higher then normal and eventually maxed out. SO I checked the coolant and it was empty??!! So I filled it and problem of overheating solved. The idling issue seems to have gotten better. Any ideas?