Zero Boost

[packlueder]

I recently did some maintenance on my car and got a 30FF code. Using my Cobb AccessPort I can see that I am making ZERO boost. I have replaced:

• Charge Pipe
• All Vacuum Lines
• Both Boost Solenoids
• Intake Gaskets, Throttle Body Gasket, and Lower Charge Pipe to Intercooler O-ring

I have verified that both wastegates close when vacuum is applied. I can visually see that the rear turbo wastegate moves when the car is turned on but I cannot visually see the front turbo so I have applied vacuum with a mighty Vac and physically felt that the wastegate moves when vacuum is applied. I have not been able to route a boost gauge into the cabin to watch the vacuum pressure while I am driving since I do not currently have the parts to do so but I would think that since the rear turbo actuator moves at idle and I verified that the front turbo actuator moves when vacuum is applied, that they should be actuated while I am driving. At the same time, the only way I can think that I would be getting absolutely zero boost is if the wastegates were open. Everything was working up until I replaced my water pump , oil filter housing gasket and accessory drive belt and pulleys about 3 weeks ago.

Anyone have any ideas? Attached are two logs from the Cobb AccessPort. One from when everything was working and another from a couple of days ago showing zero boost. Sorry for the large boost file, I am in the boost around row 35,073 ~14 psi. The only way I could attached was to change the extension to pdf, so to view it just delete the .pdf at the end of the file name.

[packlueder]

Update for anyone that may also be experiencing this issue. I ended up throwing in the towel and took it into a shop and they did a smoke test. Ended up being that the valve cover was cracked. Once they replace it the will rerun the smoke test and test drive etc. Hopefully that was the issue.

[packlueder]

Okay, just got my car back from the shop and it was indeed the valve cover. More specifically it was the PCV diaphragm integrated into the valve cover.

[thibb001]

That makes sense my car felt much better after changing the valve cover as well. Sorry no one on the forum was of any help lol.