Huge PCV LEeaks!!

[Guizado]

Hi guys, was doing a boost leak test just 5 minutes ago with a hand pump and my PCV system is comparable to a swiss cheese at at this time, had around 4 leaks, with the hand pump I couldn't get the PSI Gauge to go up one psi, now im gonna replace all that with a Oil Catch can, my real question here is, could this be the reason I am loosing 40BHP on the rolling road?

Many Thanks

 

[W11TTX]

It would cause you to loose boost pressure so maybe yes. I had a pcv leak and when I fitted a catch can with blanking the return off to the tip and venting to atmosphere, the car felt totally different and boosted alot harder .

 

[LEE69]

Not sure about 40 but if you can't even hold 1psi it doesn't bode well.

 

[Guizado]

I dont know much about how it works, on VCDS the actual boost is the same as the requested boost, as in all seems well, but on the boost leak tester with an hand pump I cant get the gauge to go up but I suppose thats because with an hand pump im not pumping air fast enough that the turbo will do.
Am I right thinking that boost Requested and actual boost meet each other, but the actual boost from the turbo reaching the cylinders is getting lost on the PCV??

 

[tom t]

Think u need more then a hand pump bud

 

[Guizado]

The hand pump Im using goes up to 160psi, i meant i coulndt pump air as fast as it went out at the leaks.
And what cant hold boost is not the turbo, but the gauge when Im hand pumping because the air goes out faster then Im pumping it In, i only mentioned it so u guys had and idea of the huge leaks i have.
The turbo readings on vcds are fine.

Sent from my HTC One X using Tapatalk 2

 

[Hobbiniho]

the ecu will get its boost reading from the map sensor which is in the boost pipework, you have a leaking pcv which is after the map sensor so i would think it would be possible to loose a bit of boost and the sensor not to pick it up but i might be wrong

 

[Guizado]

Hi Hobbiniho, I just checked and it seems the MAP sensor sits on top of the Intercooler, the PCV sensor is used for the recirculation, but thinking twice about it I guess there is no boost being lost only the recirculation gases which would make the car run too rich or to lean one of those

I have not had the chance to test the rest of the system as the holes on the PCV are huge, I guess I will be able to track down boost leaks after I sort out the big holes first.

Btw how does the boost system work with the second IC? does it go straight from one IC to the other or??

Many Thanks