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s70 lpt with ecm S70

posted by  bluegrasss70 on  Mon Aug 20 12:20 CST 2007
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last visit: Mon Oct 22 13:04 CST 2007
[RELATED]

I am new to this board but have a question about my 99 s70 lpt with the ecm
-i have a boost gauge i need to hook up
-i have looked all over the internet for the boost line to tee into.
*this car has the electronic throttle body, mounted under the manifold
-i played around this weekend with a air pressure guage and teed into the :
-wastegate tube, manifold tube, intercooler pipe tube
-- i had the gauge hooked to a 3 foot tube where i could drive the car and see the gauge on my windshield to verify when it kicks in, still no readings
-There are no vacuum lines at the throttle body
*can anyone help ?
-thanks, james

-someone did post where you can tap into the line at the right side on the manifold, but this is a vacuum, not boost.








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    s70 lpt with ecm S70

    posted by  jschaefer7406 on  Mon Aug 27 03:12 CST 2007
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    last visit: Tue Jan 15 06:36 CST 2013
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    Hello,

    IPD instructs you to connect the line to the small rubber hose on the drivers side of the intake manifold. There is a large hose connected straight into the end of the drivers side (goes to the brake booster, etc). The small hose that I'm referring to is 90° from the large one, faces the firewall. Anyway, allocate a vacuum T-fitting and tap in there. Let me know if you need anything else.

    Joe S. - Volvo Master Technician

    2000 S70 AWD, 1995 850 Turbo, 1981 242 Turbo w/intercooler








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      s70 lpt with ecm boost gauge S70

      posted by  bluegrasss70 on  Thu Aug 30 11:03 CST 2007
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      last visit: Mon Oct 22 13:04 CST 2007
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      thanks for the input. I tried all the different lines and the one that seems to work effectively is the unit attached to the front inner side of the air box . it is the sensor/line that feeds off the wastegate and the turbo. The guage reads .04 bar on full boost, i believe this is correct. .05 bar is 7.5 lbs? I'll take some pix thios wekend of the location if anyone needs it. The boost gauge is from a subaru wrx, the micro one. It fits perfectly in the left dash opening where the rear fog light switch is.








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    s70 lpt with ecm S70

    posted by  KlausC on  Tue Aug 21 11:31 CST 2007
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    last visit: Fri Oct 24 10:15 CST 2014
    [RELATED]

    The boost gauge is a vacuum gauge. It ties into any vacuum line, but not the intercooler line, which is hardly vacuum.
    When the rpms go up the pressure goes positive and when you let up off the gas the pressure goes negative.
    --
    Please answer, we need to know if the advice is good or bad. The 164 has a new home, all I am left with are 2 turbos :)







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