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Thread: dump valve problems

  1. #1
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    Default dump valve problems

    hi just fitted a forge dump valve for my 2.0 turbo vectra once fitted as in the to do guide on here my car, why would every so often go into safety mode. but once taken off was OK again. and not had a problem when not fitted??

    The 2ND thing i would like to know is are they meant to be really quiet and probably not much louder than the standard one.

    I feel like ive wasted £130 for something that is junk and is now sitting on my garage floor....

    I hope some one can answer these questions thanks..

  2. #2
    Regular Member nikroc's Avatar
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    Vehicle : 2t

    Trim : standard

    Engine : z20net

    Year : 08

    Mileage : 32000

    Default

    When I bought my Vec it already had a forge dump valve fitted...and a warning light.
    Dealer told me it was the fault of the dump valve...
    I took apart the air intake apart and sprayed some carb cleaner(I know it dont have carbs) into the intake and the sensor...
    Put it back together and............TADAAA!!
    No more light.

    As for the noise..mine has a small pipe(thinks its a vacumm pipe) which peridically comes free,and when it does I cant hear the dump valve.

    Once refitted...TSSHHHHHHHH!!

  3. #3
    Regular Member Jezzy's Avatar
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    Doesn't the 2.0T have a bypass valve already fitted?

  4. #4
    Regular Member Ian's Avatar
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    Quote Originally Posted by Jezzy View Post
    Doesn't the 2.0T have a bypass valve already fitted?

    yes they do and on most modern engines they work the opposite way as well as the nomral pressure sensor way, drawing exhaust air into the intake like an EGR valve, so they really shouldnt be disconnected.

  5. #5
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    Default

    so no one has any one have any problems with there car going into limp mode after fitting a dump valve ???

  6. #6
    Regular Member rushy's Avatar
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    Engine : Z22SE (2.2 Petrol)

    Year : 2004

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    Quote Originally Posted by yamaha2004r6 View Post
    so no one has any one have any problems with there car going into limp mode after fitting a dump valve ???
    No mate, its that there's not that many chavs that have Vec C's.

  7. #7
    Regular Member Jezzy's Avatar
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  8. #8
    Regular Member rushy's Avatar
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    Quote Originally Posted by Jezzy View Post
    Nice

  9. #9
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    hi mate have you fitted the blanking kit,you can run the hose straight to inlet i think its the top nozzle of the black solinoid cant miss it,when you buy a brand new dump valve the springs are strong let them wear in and it gets louder where people notice it when driving

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    Quote Originally Posted by vectrasri20t View Post
    hi mate have you fitted the blanking kit,you can run the hose straight to inlet i think its the top nozzle of the black solinoid cant miss it,when you buy a brand new dump valve the springs are strong let them wear in and it gets louder where people notice it when driving

    thanks mate its only my 2nd turbo car and i new it wasn't going to be as loud as my cosworth dump valve as it was running 27 PSI but i thought i would louder than it is in the vectra. and yes ive fitted the blanking kit.

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