Help with zero boost

rhscare · 08-14-2019, 08:30 PM

Hi all...so my 07 335 is new to me. Since I have had it, I get the half CEL while under boost at about 4k in 3rd. Light is gone when car is shut off so I pulled codes while the light was on and of course got 30ff. Today I logged it, and I am getting zero boost. Never gets out of the negatives. If it helps, I have no wastegate rattle, no rough idle, and the car starts up like a brand new car.

I did a smoke test about 2 weeks ago and found some nasty leaks, including a huge one at the intercooler hose and some smaller ones here and there. I am hoping that its still some vacuum leaks I didn't find.

Is there any chance that they guy just ran with wastegate rattle and that it finally just seized up or broke off or some crap which is why I am not hearing it? Any advice or tips or greatly welcomed.

Quick log:

https://datazap.me/u/rhscare/log-156...0&data=3-16-20

Gln22 · 08-21-2019, 05:18 AM

Thats rare

Bimmer_Engineer · 08-21-2019, 05:24 AM

Yeah...I’d say this is an issue with the function on the turbos rather than a leak. Have you confirm that you’re getting vacuum to the wastegates?

08-14-2019, 08:30 PM	#1
rhscare Registered 0 Rep 4 Posts Drives: 2007 335i Join Date: Aug 2019 Location: CT iTrader: (0)	Help with zero boost Hi all...so my 07 335 is new to me. Since I have had it, I get the half CEL while under boost at about 4k in 3rd. Light is gone when car is shut off so I pulled codes while the light was on and of course got 30ff. Today I logged it, and I am getting zero boost. Never gets out of the negatives. If it helps, I have no wastegate rattle, no rough idle, and the car starts up like a brand new car. I did a smoke test about 2 weeks ago and found some nasty leaks, including a huge one at the intercooler hose and some smaller ones here and there. I am hoping that its still some vacuum leaks I didn't find. Is there any chance that they guy just ran with wastegate rattle and that it finally just seized up or broke off or some crap which is why I am not hearing it? Any advice or tips or greatly welcomed. Quick log: https://datazap.me/u/rhscare/log-156...0&data=3-16-20
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08-21-2019, 05:18 AM	#2
Gln22 Banned 1 Rep 6 Posts Drives: Bmw Join Date: Jul 2019 Location: USA iTrader: (0)	Thats rare
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08-21-2019, 05:24 AM	#3
Bimmer_Engineer Lieutenant Colonel 1044 Rep 1,667 Posts Drives: 2007 335i Join Date: May 2018 Location: Louisiana iTrader: (0) Garage List 2008 Porsche Boxster [0.00] 2016 Mercedes Benz ... [0.00] 2007 BMW 335i [9.50]	Yeah...I’d say this is an issue with the function on the turbos rather than a leak. Have you confirm that you’re getting vacuum to the wastegates?
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