pcmentor

Hi, on my Toyota MotorHome it won't pass smog most likely due to an intake air leak. I have never been able to use the carb spray test very well. So I decided to seal off every connection to the intake and use a vacuum tester to see if will hold.What do you think? I have also been testing the various components as I disconnect them from the intake. I found and fixed a bad oil dipstick leak. But there is also a leak I could hear down by the oil pan that I could not locate. And little bubbles from a bolt too down there. Should I work on this crankcase leak further or is a little leak ok? I vacuum tested the brake booster too it held. Right now I am waiting for a big cork to fit in the throttle body.I am also concerned the EGR might leak and also I tested the air idle control when hot and it passed air which it's not supposed to when hot, right?

Any ideas on intake leak finding I would appreciate. Thanks

I discovered the Auxiliary Air Valve has an o ring that seals the shutter. It was leaking alot of air, I think this was my main leak. Cool. So now I will make an effort to find the small crankcase air leak as well as try to pressure test the intake, I got the cork and it fits. Thanks