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Thread: boost gauge

  1. #1
    Regular Member Swedge's Avatar
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    Default boost gauge

    im going to be fitting a boost gauge to my cdti 16v

    i want it to read vacuum as well as boost

    will i get both just drilling the intercooler pipe?

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    Regular Member MrDerv's Avatar
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    No point, Diesels don't use vacuum as they are the petrol equivilent of wide open throttle. The throttle body on the intake if the CDTI is merely used for closing the intake when the engine is turned off.

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    Regular Member XPCobra's Avatar
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    As far as im aware, No.

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    thanks

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    Regular Member XPCobra's Avatar
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    Quote Originally Posted by MrDerv View Post
    No point, Diesels don't use vacuum as they are the petrol equivilent of wide open throttle. The throttle body on the intake if the CDTI is merely used for closing the intake when the engine is turned off.
    Diesels still have a vacuum, And the 'throttle body' (Intake shutter valve) Is there primaraly for the EGR valve

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    Regular Member Swedge's Avatar
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    i was only asking because having a vacuum reading can help with finding if you have a boost/vacuum leak

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    Forum Moderator John LE's Avatar
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    You'll get a vacuum reading from the Vac pump pipes. Don't touch the ones leading to the brake servo but you should be able to tap into the vac pipes before the boost solenoid

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    Regular Member XPCobra's Avatar
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    Quote Originally Posted by John IS3 View Post
    You'll get a vacuum reading from the Vac pump pipes. Don't touch the ones leading to the brake servo but you should be able to tap into the vac pipes before the boost solenoid
    Would be pointless unless you wanted to moniter if your vacuum pump was working?

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    Regular Member Swedge's Avatar
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    Quote Originally Posted by John IS3 View Post
    You'll get a vacuum reading from the Vac pump pipes. Don't touch the ones leading to the brake servo but you should be able to tap into the vac pipes before the boost solenoid
    but then i wont get a boost reading will i?

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    Regular Member MrDerv's Avatar
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    You wont get a boost reading from the vacuum pipes. Boost reading will have to be taken from the intake, either on the manifold, or by putting an attachment on the intercooler boost pipe.

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