Boost problem

[igor136]

What about the one way valve from the IM to the PCV system?

One-way bleeder valve and the pressure regulating valve are new.

[UrS4boy]

One-way bleeder valve and the pressure regulating valve are new.

And what about the rubber "T" that the one-way bleeder valve sits in"? They are prone to split and leak.

[igor136]

And what about the rubber "T" that the one-way bleeder valve sits in"? They are prone to split and leak.

Yes, that seems suspicious. Every day I look at the "T" but I see nothing. Tomorrow I'll take it off. Maybe N80 (evaporative emissions valve) doing problem. But I have no pressure in the tank. Only when the car is not actively have a pressure in the tank.

[igor136]

If you see this picture, it is normal speed of 4 km/h when car stay ap parking?

[igor136]

Two nights looking for leaks. It was a little on the N71. I fixed it. Everything else is good. No leaks 10000%. I think the problem is in the ECU. When the car starts to accelerate, turbo shoves 1.8 bar at the moment and then it suddenly cut something. Then fall to 1.7 and so stands.

[BosnianS2]

Two nights looking for leaks. It was a little on the N71. I fixed it. Everything else is good. No leaks 10000%. I think the problem is in the ECU. When the car starts to accelerate, turbo shoves 1.8 bar at the moment and then it suddenly cut something. Then fall to 1.7 and so stands.

Kolega you need to tell us how do you test for leaks? Are you doing it properly for this engine?? It has been described many times how to do it.

Are you presurizing from MAF hose, with ventilation line from MAF hose disconected, then hole where this vetilation was pluged and line from valve cover open to atmosphere? That is very important otherwise you are not going to find many leaks if you dont do it this way.

[igor136]

Today am driving with VAG Com. "load" is the idle 33%. When full throttle "load" is 108%. Why is this and is it bad? T.B Angle was 97%.

[igor136]

Kolega you need to tell us how do you test for leaks? Are you doing it properly for this engine?? It has been described many times how to do it.

Are you presurizing from MAF hose, with ventilation line from MAF hose disconected, then hole where this vetilation was pluged and line from valve cover open to atmosphere? That is very important otherwise you are not going to find many leaks if you dont do it this way.

I made a test from the turbo outlet, with angle open. The foam around the engine and pipes. Maybe I'm wrong. I do not know. Thanks for your help.

[igor136]

What do the owners of the Audi UrS6 when thea dont sleep - They looking for a boost leak. Boost leak in mine head, boost leak in my wallet, boost leak everywhere.

[UrS4boy]

I made a test from the turbo outlet, with angle open. The foam around the engine and pipes. Maybe I'm wrong. I do not know. Thanks for your help.

Did you follow the recommended procedure that I linked to in Post 2 in this thread? (which by the way is after the MAF, not the turbo, with some lines plugged, accordingly).

[igor136]

I did it today. Maf to turbo hose is little bad (turbo side), but not much, minimun. What are the consequences? Bost leak on WG valve, thats all

[UrS4boy]

I did it today. Maf to turbo hose is little bad (turbo side), but not much, minimun. What are the consequences? Bost leak on WG valve, thats all

If you have a girl friend/wife, beware when she says she is a "little pregnant".

Not sure which "WG valve" you are talking about. The N75 or the big metal thing on the exhaust manifold?

[igor136]

Big metal valve on the exaust manifold. N75 is new.

[igor136]

Some other symptoms:
- unstable idle
- unstable RPM
- no smoke
-normal gasoline consumption( 8-12 liter)

[mike74]

IMO what you've just described is a boost leak. IF you're confident there isn't one, however I would go back to basics. Check plugs for decent spark at each plug, change fuel filter, clean MAF and its connection, and make sure the fuel pump is operating correctly (check for good earth and good voltage). My old Pulsar ran like a dog until I eventually got it on the rollers and found out the injectors were blocked. Sometimes its the things you least expect to be at fault! Good luck