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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Rough Idle and Fluctuation During Deceleration!



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      12-02-2008, 07:00 PM   #23
JNic335i
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glad that you fixed it man
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      12-02-2008, 09:31 PM   #24
Bubbles
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So you Roto Rooter(ed) the pipes eh?
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      12-02-2008, 10:41 PM   #25
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So you Roto Rooter(ed) the pipes eh?
haha!
Pretty much.
I put the CC back on and did some good pulls and pretty much blew out the pipes.
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      12-02-2008, 10:49 PM   #26
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Glad you got it man!! your really are the ultimate DIY fixer!!
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      12-02-2008, 11:32 PM   #27
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wow, I didn't know our engines have the PCV valve problem too. My last car (MKV VW GLI; 2.0T motor) had that problem and tuners actually went out of their way to make a fix for it. Here's a link: http://forums.vwvortex.com/zerothread?id=4014933

It's actually a revamp from what I had on my car which was 2 silicone tubes with a diverter so there will be no blowback, something like that, haha.
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      12-03-2008, 09:39 AM   #28
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wow, I didn't know our engines have the PCV valve problem too. My last car (MKV VW GLI; 2.0T motor) had that problem and tuners actually went out of their way to make a fix for it. Here's a link: http://forums.vwvortex.com/zerothread?id=4014933

It's actually a revamp from what I had on my car which was 2 silicone tubes with a diverter so there will be no blowback, something like that, haha.
The problem that I was having was that I incorporated 2 long hoses for the catch can but took the catch can out.
There was such a long mode of travel for the gases and there wasn't enough pressure to get the gases "up and over" since gravity was a big part of this setup.

Once I added the catch can again, I did a couple strong pulls while letting off the gas quickly so there would be some serious blow by.

Also, Scalbert,
I looked again today and 14.4 was the peak but seemed to fluctuate between 13.8 and 14.2.
While keeping a steady speed on the highway, it pretty much stayed at 14.1-14.2
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      12-03-2008, 09:57 AM   #29
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I looked again today and 14.4 was the peak but seemed to fluctuate between 13.8 and 14.2.
While keeping a steady speed on the highway, it pretty much stayed at 14.1-14.2
That is about what I would expect, an average near 14 VDC.
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