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Vacuum leak? 1994 855T

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
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butchwill
Posts: 6
Joined: 24 May 2012
Year and Model: 1994 855T, 2006 C70
Location: Illinois

Vacuum leak? 1994 855T

Post by butchwill »

Gas mileage down to 19 from 27, hard brake pedal below 15 degrees F, AT won't shift below 10 degrees F. Is this a bad vacuum hose from the power brake booster? Moisture in the brake booster check valve? How do I diagnose a bad check valve? I can't find a diagram of where the brake booster vacuum hose attaches to the engine. Is there a vacuum connection to the AT?

1994 850 Turbo Wagon 187K miles
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shaker_chi
Posts: 400
Joined: 29 June 2009
Year and Model: 94 850, 98 S70T5 M
Location: Chicago
Has thanked: 3 times
Been thanked: 3 times

Post by shaker_chi »

Here is a great website to get diagrams and part numbers:


http://www.volvopartswebstore.com/
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