i have a vacuum leak( causing o2 sensor CEL lights periodicallyh and ebrake warning under hard braking)


* ive removed intake manifold a few times adjusting valve clearance. issue occurred after this.
*ive tried using carb cleaner to locate vacuum leak( i guess its too small)?


anyways should i cap this vacuum line( i can hear the suction in it) or do i leave it open. Its in the passenger side of the firewall, pics shown below





and zoomed out










also if anyone could kindly take a picture of their vacuum line routing on the driverside of the engine bay by the intake manifold; it would be greatly appreciated.

 

Oh man if no one knows cab somebody take pics of there sc300 outside at least please. Thanks for the help guys

 

I don't see an open vacuum line in either pictur

 

Mine is open like that as well. Must be part of that mysterious system known as "EVAP"
Never felt if it has vacuum or not. I always wanted to know what it does but always forgot to look it up.

 

here !




sounds good sir! its just this issue came out of no where. its either one of these lines or one other thing i might be overlooking. my valve cover broke so im using a random fuel line as a hose which doesnt fit exactly snug. im waiting to stumble upon another valve cover so i can fix that and get it taken care of:

 

That is your pcv valve it should pull out. 6 dollar part.

 

The first one is a check valve for the charcoal canister. I would not cap it off.

 

Pcv valve should be on the valve covers not there.

 

You are right first pic check valve last pic pcv.

 

thank you thank you thank you. had no idea it pulled out. i tried pretty hard but didnt want to damage anything. I'll try getting a replacement shortly. hmmm not to find out which vacuum is misrouted!

 

do not cap the first one it is definately a safety relief valve for the evap canister, it will only release pressure if the canister builds up too much pressure before the engine has a chance to draw it in. it is a safety feature that only opens in emergencies so it should not be capped off.

 

Even a blind squirrel finds a few nuts.

 

Just checked this to confirm. He is right. Don't touch it and leave it alone. It's like that.