1993 Toyota Camry 2.2L - hissing noise when car idles
 

I just finished installing my cylinder head and everything else on my 1993 Toyota Camry 2.2L. Car started up great. The only thing I notice is when the car idles I hear a hissing noise near the throttle body. I tried to track it down, but have not as of today (maybe tomorrow). As soon as I give it gas it stops immediately. Just wondering if anyone had a clue here. I am starting to suspect the EGR, but I am not sure. All the hoses were put back properly as well as everything else. All new gaskets also. Like I said the car really runs great other than this. I placed my hand under where the throttle body is near the EGR and the sound changed a bit. I am wondering if the gasket is just bad on the throttle body. Maybe the hiss is normal? I can't recall it hissing before I took it apart. That is what's bugging me. Not sure about this.

I would suspect you have a vacuum leak somewhere. Take a closer look and try using throttle body/carb cleaner spraying at suspected areas to see if it affect the way the engine runs. If you spray at an area and notice a change in the idle quality or idle speed- your very close to the source of the leak. Check the intake hose before the throttle body- these are known to crack open over time.

JJ