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The 5th generation BMW 3 Series is based on the E9X platform. The car pictured is a E90 chassis. The E9X chassis was used from 2004-2013 when the F1X chassis was released. When talking about a non-specific chassis, this generation is typically referred to as the E9X chassis since there are multiple chassis for this generation of 3 series, depending on the body style (E90/E91/E92/E93).

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Why is my car rpms fluttering in between 1000 and 1500

I have a 2008 bmw 335i and it is fluttering from 1000 rpm to 1500 rpm

It started after I attempted to clean my intake valves.

Codes are

P1417

P1632

P1638

P11:

P1639

Answer this question I have this problem too

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1 Answer

Have you replaced your spark plugs?

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2 Comments:

Before the valve cleaning I replaced spark plugs ignition coils and fuel injectors

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Ok, well unfortunately that's all I got. I've just had some experience replacing spark plugs that were causing the engine to stutter a bit.

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Melech will be eternally grateful.
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