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 Pressing the brake increases the idle speed...why?

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tango_van
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PostSubject: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:15 pm
foot on brake: idles at 1300rpm

lift foot off break: idles at 900rpm


weird. any ideas.

(have checked none return valve and replace rear vac hoses to engine)
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Mr Scoops
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:20 pm
Have you got a servo fitted??

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tango_van
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:22 pm
yep. have replaced rear hoses, but not looked at the servo yet..

anything I need to check?
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Mr Scoops
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:27 pm
I think it is something to do with the servo leaking........but can't quite remember.

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nomates
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:27 pm
don't know .....but it defo servo related

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tango_van
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:29 pm
damm. new ones are around £220 from heritage.

not good news. Sad

was hoping it was a hose leak.... but it ain't gone away.
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Mr Scoops
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:31 pm
Pretty sure it is an airleak......

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nomates
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:33 pm
what scoops says makes sence .....the manifold leaks causing the engine to run sligtly lean , increasing the idle speed

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Mr Scoops
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:34 pm
nomates wrote:
what scoops says makes sence .....


Woo Hoo, that's the first time this week!!

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tango_van
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:45 pm
will re-check all hose connections.

it must be forward of the none return valve/one way valve (so not the balance pipes or connections)

Anywhere do metal 1/4 NPTF vac pipe connectors that screw intot he manifolds to replace the plastic ones.?
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tango_van
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:45 pm
cheers Scoops,

it makes sense now why it picks up the idle speed.. sunny
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Mr Scoops
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:47 pm
Spray some WD40 on the joints and see if there is any difference in engine note.

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tango_van
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:48 pm
what...



with my foot down on the brake pedal at the same time affraid
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Mr Scoops
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PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:50 pm
Get Wiz Biz round....

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tango_van
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Location: WSM - 200 yards from Meester Teem and 900 yards from Wizbizmartin
My Ride(s): 1972 Westy Camper Van, 2007 Golf+
Registration date: 2006-10-11

PostSubject: Re: Pressing the brake increases the idle speed...why?   Thu Oct 22, 2009 10:52 pm
sounds like a plan...


before he goes on his trek up north to start pushing a bug back home down the m5
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Pressing the brake increases the idle speed...why?

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