I'm having problems with my 87 crx si.It surges at an idle.I just buoght this car ,it has some cheezy cold air intake on it,and it idles anywhere from 1000 to 3000 rpm.also i put a new water pump on it,but it still wants to overheat.this is my first honda ,and i dont have a book.I couldnt even find a thermostat.any info on this would be appreciated