Autometer Boost Gauge Problem
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This is a discussion on Autometer Boost Gauge Problem within the Interior Mods forums, part of the Tech & Modifying & General Repairs category; Just installed the Autometer boost gauge. Everything was fine. engine at off is at 0psi idle -14psi at wide open ...

  1. #1
    Registered User skoobywrx's Avatar
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    Autometer Boost Gauge Problem

    Just installed the Autometer boost gauge.

    Everything was fine.

    engine at off is at 0psi

    idle -14psi

    at wide open its about 8-9 psi

    wheres my other 5?
    my car feels fine before and after the gauge install
    mods,
    Turbo XS TH BOV

    K&N Typhoon(i know i know, but hey, it was free for a mock from K&N)

    axle back

    I ver read and searched for some items.......but no clear answer

    would the nylon tube connection have a problem? kinks in the tube? Im gonna switch to all rubber tubes tonight....any other things you can think of?

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  3. #2
    Registered User Ludecrous's Avatar
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    check the tubes, the tee fittings and adapters, at idle you should not be reading 14psi, you should be reading Vac not boost.

  4. #3
    Registered User 04blkWRX's Avatar
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    That looks like a negative 14

  5. #4
    Registered User skoobywrx's Avatar
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    that should 15vac, mmhg

  6. #5
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    actually it would be in in/hg inches if mercury
    Integra LS TURBO for sale PM me

  7. #6
    Registered User dcraw6782's Avatar
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    check your boost line and fittings - i had the same problem, and found a leaky fitting under the dash - once i replaced that - no problem.
    "Let me never be accused of standing between a Charlestonian and his drink" - J. Kuhn

  8. #7
    Registered User Rubby_Subby_R1's Avatar
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    3/16" Mod???

    Did you do the 3/16" Mod???? If so, that is probably what is causing your low boost. I just had the exact same problem with an Autometer guage. I couldn't get more that 7-8 psi in any gear. I triple checked the line for kinks and leaks and found none. I thought about the 3/16" mod and decided to put the factory fitting back in to see if that was the cause. Sure enough; now I am pulling about 13 psi in 3rd and 4th.

  9. #8
    Registered User skoobywrx's Avatar
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    thanks guys, for all your help.....

    found the problem........

    return the car to stock hoses, and there was still a prob. found out that my boost solenoid was out. so right now im using a boost controller, turned it to about stock boost, will replace the solenoid.!!!

    thanks

  10. #9
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    I've got a similar problem...

    Autometer boost gauge is reading 0 at idle, ~25psi at WOT.... I'm guessing for some reason I'm 14psi too high (that would put max boost somewhere in the realm of stock). I really back off the throttle when I see that guage hit 25.

    Shouldn't the gauge read about -14psi at idle??

  11. #10
    Registered User 04blkWRX's Avatar
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    UGotBoost: Is your gauge electric? If so, its not calibrating properly at startup so it thinks your idle pressure is 0 psi and it goes up from there. You need to power it off a circuit that remains powered during cranking.

  12. #11
    Official ClubWRX arms dealer SOUTHPAW's Avatar
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    What the he11 is the 3/16" mod???
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  13. #12
    Registered User Dream's Avatar
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    Originally posted by SOUTHPAW
    What the he11 is the 3/16" mod???
    -2006 WRX Wagon-

  14. #13
    Official ClubWRX arms dealer SOUTHPAW's Avatar
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    Got it.
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  15. #14
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    Originally posted by 04blkWRX
    UGotBoost: Is your gauge electric? If so, its not calibrating properly at startup so it thinks your idle pressure is 0 psi and it goes up from there. You need to power it off a circuit that remains powered during cranking.
    That sounds like it's my problem; I've got the gauges powered off of the radio's power, which is cut during cranking.

    Where's a circuit I could tap into that remains powered? Also, I'll only need to power my red (+voltage) wire off of it... a ground's a ground, right?

  16. #15
    Registered User 04blkWRX's Avatar
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    Originally posted by UGotBoost?
    Where's a circuit I could tap into that remains powered? Also, I'll only need to power my red (+voltage) wire off of it... a ground's a ground, right?
    Yes, a ground is a ground.

    For power, I tapped the fuse to the lower left of the fuse panel. I put a 1A fuse on the wire to my gauge as well, so its a more convenient spot if I need to change it.

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