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Thread: boost problem

  
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    jay r's Avatar
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    Angry boost problem

    ive got a collins, forge and bailey dump valve it doesnt matter wat valve i fit when i change gear you can hardly hear the valve dump and when i go to neutral it cuts out ive been to thorney today and theres nothing wrong with the dump valve fitment apparently ,one of my concerns is the vacuum hose is holding the valve open and it does it no matter wat spring is in has any one heard of this before . could i have a air leak some were and if so how do test it ?
    is this a air mass meter issue ?

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    Do you have a remap on the car?
    Astra Coupe Z20LET EDS stage 2


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    jay r's Avatar
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    yes stage 1

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    eacyep astra's Avatar
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    i have a collins and a stage 1 and mines fine mate.. where have you put the t piece thats conected to the dump value? and the vacuum t piece?

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    have you tryed checking the oe valve, when my dv started doing the same thing as yours but not cutting out, i found out that my oe dv had split. are you just running the aftermarket dv on its own or with both?
    Arden Blue GSI And You Know Its The Best Colour To Have

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    jay r's Avatar
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    fitted t piece at fuel preesur reg from thread on vxr club and got a spacer in side of turbo were original spring was followed instructions for bailey kit wat do you mean by oe valve helppppppppppppppp

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    Hi m8. If you have stage 1 then probably you should have some boost.
    If you got the Forge valve on the FPR, and the OE Dv (this is the valve from the turbo, that goes behind the engine, at rear BCS) the you will hear very slow that dump.
    Try kill the rear BCS, by bolting all the hoses that comes out of him ( the one coming from turbo, and the one going to FPR). Also, try by passing the OE Dv from the turbo, that should make the dump real loud.
    There is a topic out here, Fitting dump valve.....is very useful.
    Cheers.
    Astra Coupe Z20LET EDS stage 2


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    Wot u mean holding the valve open? U mean on the after market dump valve? If its wot mines doin then ive been told its fine, i can c the spring on idle of the baileys.
    PHASE 3 ON A SWITCH WIV A GARRETT

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    Quote Originally Posted by ZAF_GSI View Post
    Wot u mean holding the valve open? U mean on the after market dump valve? If its wot mines doin then ive been told its fine, i can c the spring on idle of the baileys.
    yer thats ok when your on idle. its when you throttle the car it should close, then when you realese the throttle it should open again
    Arden Blue GSI And You Know Its The Best Colour To Have

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    just had a thought check your little black vaccum box located at the back of the engine underneth. the lines normally pop off. if not i would disable the rear bcs then go from there. double check every vaccum pipe, that there not split and connected properlly
    Arden Blue GSI And You Know Its The Best Colour To Have

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