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Stiff brakes

Third generation Volvo V70 wagon and XC70, and second generation S80. Are you an owner? Prospective owner? Get in here and join us! Start a new topic or comment on an existing thread.

2008-2016 V70
2008-2016 XC70
2007-2016 S80
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DougS
Posts: 2
Joined: 5 February 2019
Year and Model: 2009 S80 T6
Location: CT

Stiff brakes

Post by DougS »

2009 S80 T6, Not sure what I could have done but.... I took half the top of the motor apart to reach the bank1 O2 sensor, replaced it, put it all back together now the brakes are real stiff and barely stop the car when I stomp on them. I took all the plastic crap off again and checked all the wiring connections and everything looks good, no check engine lights or vehicle messages, anyone got a clue what I could have done to it??? I did unplug the connections to the computer and unhooked the battery while replacing the sensor, not sure if that might have caused the braking issue.
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jimmy57
Posts: 6694
Joined: 12 November 2010
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
Has thanked: 4 times
Been thanked: 320 times

Post by jimmy57 »

The vacuum pump for power brake booster is at rear of engine at end of intake cam. The pump body has a black hard line stuck into it. Check to see that it is in place.
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DougS
Posts: 2
Joined: 5 February 2019
Year and Model: 2009 S80 T6
Location: CT

Post by DougS »

It was the hose, I cut it when taking out the stupid false firewall, thanks for the help!
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