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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 > Fuel system difference - 135i vs 1M



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      04-28-2011, 03:25 AM   #1
AltecBX
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Lightbulb Fuel system difference - 135i vs 1M

Good find from rem3 on the other site.

135i



1M




Could it be that the 1M has two inbound lines for more fuel on the N54...

Last edited by AltecBX; 04-28-2011 at 03:31 AM..
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      04-28-2011, 03:53 AM   #2
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Very interesting What is that part # 2 on the 1M where the line gets double?
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      04-28-2011, 03:56 AM   #3
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Quote:
Originally Posted by Autobahn335i View Post
Very interesting What is that part # 2 on the 1M where the line gets double?
I believe is some kind of filter.
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      04-28-2011, 07:32 AM   #4
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Are the intank pump part#s different?
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      04-28-2011, 11:11 AM   #5
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Yup definitely a filter



Oddly enough, this second line only shows up when the Euro region is selected. The US region 1M N54T has the same line as that of the 135i.
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      04-28-2011, 11:26 AM   #6
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Here's the intank pump for the Euro version vs US version :

Euro :


US
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      04-28-2011, 01:11 PM   #7
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So the 1M fuel system has a fuel return...Does this mean the filter they added in acts as a fuel pressure regulator? That would be the only way it could return fuel from the filter that makes any sense.
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      04-28-2011, 08:13 PM   #8
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Quote:
Originally Posted by jb's335 View Post
So the 1M fuel system has a fuel return...Does this mean the filter they added in acts as a fuel pressure regulator? That would be the only way it could return fuel from the filter that makes any sense.
I thought there was already a fuel return? Maybe I'm wrong.
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      04-28-2011, 08:44 PM   #9
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Looks like they both have a fuel return.
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