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Surging Sometime When Brake is Applied

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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mrlowkey
Posts: 21
Joined: 16 November 2011
Year and Model: 1995
Location: USA

Surging Sometime When Brake is Applied

Post by mrlowkey »

HELP PLEASE!
It seems occasionally when slowing down to a stop , my Non-turbo 850 somtimes surges, or act's as if it will possible buck, or cut off, if anyone out there have any leads on this problem thanks in advance for your help?
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Ben850
Posts: 1613
Joined: 8 September 2011
Year and Model: 1996 850 R Wagon
Location: Michigan
Been thanked: 7 times

Post by Ben850 »

That is most likely the vacuum line to the brake assist. Check that for leaking. Also, make sure the brake light switch is properly adjusted. Funny as that may seem, as it also sends a signal to the TCM.
1993 850 GLT , You wouldn't know it.
1996 850 Turbo Wagon White.
1995 T-5R Black. New work in progress.
1998 V70 XC Cross Country White.
1994 850 N/A Wagon Black.
1997 850 Sedan Black.
1996 850R Wagon White.
1997 850 Sedan Red ( not white or black!)
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Mindlink
Posts: 3
Joined: 4 March 2013
Year and Model: 1997 850
Location: United States

Post by Mindlink »

Clean out your throttle body and your throttle position sensor. It's likely they're both gummed up. If that's the case, invest in a new air filter as well.
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