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Thread: Quick bit of advice on low boost.

  
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    Coupe John's Avatar
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    Quick bit of advice on low boost.

    Just thought I would post this up to help people, over the the last week or so Ive noticed my boost drop by about 3psi which had me confused for a while as to what the problem was, I checked every single vac pipe and boost pipe for leaks and splits but nothing But for some reason I took the one way valve off the one which goes between cam cover and throttle body and bingo the valve was broken, you could blow through both ends put a new one on and it's fixed back to 12psi overboost and 9psi held.

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    tim1547's Avatar
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    had exactly the same problem was bugging me for AGES!knew something was up cos boost not coming in properly similar symptoms to AFM failure so def worth checking this...mine had literally detirioated inside the hose. £15 later and ten minutes work car back to normal!
    Astra coupe turbo 280bhp-sold
    BMW E60 5 Series M Sport

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