Low boost
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This is a discussion on Low boost within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I was chasing this problem a year ago and gave up. I used to feel a big pull at 3200+ ...

  1. #1
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    Low boost

    I was chasing this problem a year ago and gave up. I used to feel a big pull at 3200+ rpm but it slowly went away. at first it was intermittent, and through the boost curve i could feel it drop off sporadically almost as if it were missing but nothing indicates a misfire, no codes or anything. It still seems pretty powerful for a 2.0 so I'm pretty sure the turbo is working fine. I had the intake apart and checked the hoses, didn't find any cracks or anything. I did find a crack in the vacuum line that goes from the intake to the wastegate solenoid and excitedly replace all the vacuum lines in that system making sure to keep the restriction bead where it goes, but it didnt fix the problem. I know there's pressure in the system because I loosened the BOV bolts to see if there was a power drop and could hear the air being forced through the loosened fitting. I dont have any other way to check the pressure. any suggestions? could the BOV be stuck open?

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  3. #2
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    The BOV is stock with the hose feeding back int the intake. as is everything else.

  4. #3
    OMG WTF MainFrame's Avatar
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    Maybe try doing a boost leak test with an air compressor, I know I've uncovered leaks I never knew were there.



    Also a datalog, or even look at learning view would be helpful.

  5. #4
    Pro Manscaper Mikie13's Avatar
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    ^that.
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  6. #5
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    Is there an easy way to block the system and add a fitting?

  7. #6
    OMG WTF MainFrame's Avatar
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    Something like this Boost Leak Testers can be made pretty cheap. All you need is a valve stem, PVC cap, silicon coupler, hose clamp, and some JB Weld. Disconnect the PCV fittings and plug them up, along with anything else you're not trying to test..

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