I have a 2004 XC70 with 85K miles on it that has sluggish performance compared to my 2006 XC70 with similar mileage. I don't have VIDA/DICE yet, as I recently bought these cars after 9 years with my previous 2000 V70. My 2000 was NA, and the acceleration performance was similar to my 2004. I scanned it with my ELM-327 and Torque app, and it came up with a pending PO299 (low boost).
The induction hoses look OK, and the 3 vacuum lines look good, although it was hard to see the ends behind the motor-- I will look more closely. I did pick up some used turbo solenoids (the one clipped to the airbox) last time I was at the pick-and-pull that I could try if this is a candidate for causing low boost.
Let me know what the "usual suspects" are for low boost. Thanks in advance!
2004 XC70 PO299 low boost
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Herb Goltz
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RickHaleParker
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Leaking Charged air pipes. The pressure escapes somewhere between the turbo and the intake manifold.Herb Goltz wrote: ↑01 Nov 2020, 20:02 Let me know what the "usual suspects" are for low boost. Thanks in advance!
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1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
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