Volvo AWD 850 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 3/2003 850 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

Where Did My Boost Go ? 850 1997

posted by  vesparally on  Sat Mar 18 17:27 CST 2023
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Tue Oct 21 18:11 CST 2014
[RELATED]

1997 850 GLT (LPT) 200K miles

Car is down on power, acting like my old NA 850.
I can hear what sounds like boost pressure leaking from some where when I am accelerating.
Not seeing any bad/blown hoses from the turbo to intercooler to TB intake.
Do intercoolers even go bad? I'm see a small hole with a smudge of oil around it at the bottom low point of the intercooler. Weep hole ???

I attached a vacuum/pressure gauge to the vac. tree (no stock "boost" gauge) and I get a reading of around 18" of vac. at idle, 9" at cruise & 0" of vac. at WOT, normal?
Is there an easy way to attach a gauge to measure actual/real boost pressure ??

Sort of sounds like the wastegate is stuck open, but I don't think that's it.
Can't reproduce the sound unless under load (driving).
Will fabricating a way to manually add some low PSI to the TB intake hose be a viable way to listen for a leak ???

What are the most likely places I should be looking at.

Thanks
Peter





THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Where Did My Boost Go ? [850][1997]
posted by  vesparally  on Sat Mar 18 17:27 CST 2023 >


<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.