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2005 V50 T5 - Uneven Acceleration

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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Reinie
Posts: 55
Joined: 17 February 2009
Year and Model: 1999 S70
Location: stillwater, mn

2005 V50 T5 - Uneven Acceleration

Post by Reinie »

My 2005 V50 T5 FWD AUTO has very uneven acceleration. Best way to describe it is "jack rabbit starts". Almost like the turbo is over-boosting at the slightest touch of the accelerator, then drops-out and fluctuates RPM's between gears. The throttle body was removed and cleaned. Recently replaced the fuel pressure sensor (took care of an unrelated issue with the engine temporarily cutting-out). I was told to run a sweep test to diagnose. My thoughts are either the throttle body, turbo TCV, fuel pump, or computer. Anyone had this?

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