i have a dohc zc motor and i was wondering if the o2 sensor is not installed would it cause the car to have a cold idle? like it takes like 5 seconds for the motor to turn over and when it does it idles at 400-500 rpm until i start driving then it idles normally. but this happens every time i turn on my car.. hot or cold.

 

yeah it might idle weird and be super loud with no o2 sensor in the manifold and all that exhaust coming out

 

oh sweet thanks... btw does anyone know where i can get dohc zc parts? ebay doesnt have any for dohc zc motors..