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Author Topic: Boost/Vacuum Issues  (Read 3794 times)

Offline Shamm

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Re: Boost/Vacuum Issues
« Reply #15 on: April 26, 2017, 02:21:27 pm »
Have you got a link for that

Offline KieranM

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Re: Boost/Vacuum Issues
« Reply #16 on: April 26, 2017, 04:48:29 pm »
I'm going to log timing and boost tonight and see if that can shine a light on what's going wrong. It is also going to get a smoke test tonight and see if there is anything obvious that's causing the issue

Offline KieranM

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Re: Boost/Vacuum Issues
« Reply #17 on: April 26, 2017, 06:19:14 pm »
That's the results of a 4th gear pull


I don't understand why the actual is higher than the specified a number of times? Surely if it was a boost leak it would be significantly lower than the specified?

Offline pudding

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Re: Boost/Vacuum Issues
« Reply #18 on: April 27, 2017, 10:57:37 am »
What happened between 3400 - 2760 rpm?  Did you back off the gas?

Has the wastegate tension been adjusted?

It's only a snap shot of the log, so it's difficult to see the full picture.  You will always get latent pressure hanging around in the intake when the N75 changes, it's nature of turbo engines.  Actual and requested isn't an immediate response.


2007 ED30 | 2009 TDI 140 | 2016 BMW 330D

Offline KieranM

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Re: Boost/Vacuum Issues
« Reply #19 on: April 27, 2017, 11:05:16 am »
Yeah it was because I packed off the gas. After doing a smoke test last night the smoke was coming pouring out of the front PCV and there was a little out of the rear PCV pipe. I'll fit a new PCV tonight and see how I get on.