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  1. #1

    Join Date
    02 Feb 2013
    Location
    Washington State
    Posts
    2
    Saab(s)
    86 900 turbo; 87 900; 87 900S; 88 900; 88 900 turbo; 89 900S; turbo; 87 9000 turbo; 93 9000 turbo
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    Turbo gauge inop

    I had to replace a couple of my cluster illumination bulbs and had the dash bolster apart replacing my clutch pedal and master. Since then my turbo gauge has been inop. Has anyone seen this happen before and have a suggestion where to look? I don't see a diagram in the Bentley book that shows how the gauge is hooked up or connections from under the hood to the gauge. Any help would be appreciated. This is on my 88 900 Turbo 3 door.

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  2. #2
    Paul A
    Saab Nut
    Join Date
    11 Mar 2011
    Location
    West London and Wiltshire, UK
    Posts
    251
    Saab(s)
    T16 '93 Ruby - T16 '94 Vert Ruby
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    Quote Originally Posted by 4everSaab View Post
    I had to replace a couple of my cluster illumination bulbs and had the dash bolster apart replacing my clutch pedal and master. Since then my turbo gauge has been inop. Has anyone seen this happen before and have a suggestion where to look? I don't see a diagram in the Bentley book that shows how the gauge is hooked up or connections from under the hood to the gauge. Any help would be appreciated. This is on my 88 900 Turbo 3 door.
    It's most likely you've disturbed the vac. hose that comes from the inlet manifold. This comes from the manifold through the bulkhead near the LHS door, then to the over-boost switch and the pressure sensor for the APC and finally to the boost gauge. The hose could have come off or be damaged at any of these areas. You may find that turbo performance among other things may be affected if the pressure sensor is inoperative. Don't confuse this hose with the vac. hose that goes the vac. ventilation reservoir on the RHS.

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  3. #3

    Join Date
    02 Feb 2013
    Location
    Washington State
    Posts
    2
    Saab(s)
    86 900 turbo; 87 900; 87 900S; 88 900; 88 900 turbo; 89 900S; turbo; 87 9000 turbo; 93 9000 turbo
    Thumbs Up:   0
    Thanks for the info. I haven't owned the car long so I don't know if all the vacuum lines ae even routed 100% correct. I will start tracing. Best!

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