I bought a motor from advance auto parts about 2 weeks ago.Motor has a slight ticking/knock/ping.I could not get the old knock sensors out of old motor so i proceeded to install new motor until i could afford 2 brand new knock sensors.Could motor be pinging because of not having either knock sensors hooked up?Car is not a daily driver.anyone have similar problems/experience with knock sensors on a 3800 series II .CAR IS A CHEVY MONTE CARLO SS