Be been chasing a problem where my car had problems starting and is running lean under boost. Not sure if they are related.

Anyway I cleaned all the grounds and did a vacuum leak check. There are no vacuum leaks anymore except the AOS. I know a lot of people pressure the system after the turbo, but. Since the MAF (m-tune) is before the turbo I wanted to make sure everything is well sealed.

My question that I can't find an answer too: when I blown into the tube that goes from the AOS to the MAF pipe I can blow through it very easily. Is this normal? Where is it venting? And yes the oil cap is on tight. There is no check valve on the tube either, the hole is plugged.

Other info: Leakdown 6-7-7-9 % on cylinders 1-4. That should mean that blow by isn't an issue.

Any help is appreciated.

 

Dipstick tube... Duh

 

I'm thinking dipstick tube Phil

 

lol After much consideration, maybe it's the dipstick tube?

 

Please don't bump this thread. I'm embarrassed...

Yes it was my dipstick tube. Once i put it back it in the crankcase seems to be well sealed.

 

You should probably delete this thread. We are a mob of heartless bastards around here!

 

LOL
Speak for yourself E !!!