Hi Guys. My car is civic 96 vti. Sobrang common talaga idle issues sa kotse na to. Anyway, I followed the proper procedure in setting the correct idle rpm (take out power to iacv, set the rpm to 450, turn off engine, reconnect iacv power, reset ecu). However, idle stays at 1000 rpm. Im suspecting there is a vacuum leak somewhere kaya mataas ang idle. How do I look for vacuum leaks on my engine?

THanks!