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  1. #1
    garyrmills's Avatar
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    Boost gauge only reads negative boost?

    when i fitted my boost guage it worked fine for a week or so then it started to only read negative pressure.
    ive got the pipe t'd into the dump valve breather on the top of my oo7p its not a blocked pipe as ive changed the pipe for stronger pipe and its still doing the same? the boost wont read over 0 psi. ive also tryed a new guage and t peice any ideas would be great
    thanks in advance gary

    Audi s3 apy stage 2 revo remap,custom front mount cooler, green cotten air filter, forge dv+samco relocation,silicone re circpipe, TIP, N75j, smoothed air box valve, 3" stainless downpipe and sports cat, boost guage, braided goodridge braided front brake lines, red stuff pads,drilled grooved front disks, grooved rear disks,weitec shocks n springs, LCR splitter, facelift rears, 10k HiDs and 18" tt rims and HnR wheel spacers

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  3. #2
    s3_kev's Avatar
    Stage2'd!!!!!!

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    try t'ing it correctly, you need to T into a inlet manifold vaccum line

  4. #3
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    i dont think it makes much difference any of the vacuum hoses will do have u got any leaks like around the t piece any split hoses

  5. #4
    garyrmills's Avatar
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    Any chance of pics as im not sure which pipe to go to either that or abit of an explanation please mate. Is strange that it worked on the hose from top of dv before and not after a while tho?

    Audi s3 apy stage 2 revo remap,custom front mount cooler, green cotten air filter, forge dv+samco relocation,silicone re circpipe, TIP, N75j, smoothed air box valve, 3" stainless downpipe and sports cat, boost guage, braided goodridge braided front brake lines, red stuff pads,drilled grooved front disks, grooved rear disks,weitec shocks n springs, LCR splitter, facelift rears, 10k HiDs and 18" tt rims and HnR wheel spacers

  6. #5
    s3_kev's Avatar
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    Quote Originally Posted by djdougalno1 View Post
    i dont think it makes much difference any of the vacuum hoses will do have u got any leaks like around the t piece any split hoses
    it does make a difference as you need manifold pressure not just any old vaccum pressure, the line from the dump valve goes through the n249 valve so its never going to give correct readings.

  7. #6
    s3_kev's Avatar
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    Quote Originally Posted by garyrmills View Post
    Any chance of pics as im not sure which pipe to go to either that or abit of an explanation please mate. Is strange that it worked on the hose from top of dv before and not after a while tho?
    it does seem strange that it was ok and now its not, yeah it does work using the line from the dump valve but its not an accurate enough route, the line from the fuel pressure regulator is a good one thats the little valve on the right hand side of the fuel rail as you look at it

  8. #7
    garyrmills's Avatar
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    nice 1 il have a looky tommorow

    Audi s3 apy stage 2 revo remap,custom front mount cooler, green cotten air filter, forge dv+samco relocation,silicone re circpipe, TIP, N75j, smoothed air box valve, 3" stainless downpipe and sports cat, boost guage, braided goodridge braided front brake lines, red stuff pads,drilled grooved front disks, grooved rear disks,weitec shocks n springs, LCR splitter, facelift rears, 10k HiDs and 18" tt rims and HnR wheel spacers

  9. #8
    S3 Nattie's Avatar
    Quattro ist für sissies

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    You could also T it into the fuel pressure regulator. Check that the piping that goes to the gauge has not folded or twisted on itself.
    For sale

    3" Downpipe and de cat (will be going on ebay soon)
    Autogauge boost gauge
    Chrome Audi Number plate surrounds

    PM for info.

 

 

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