Volvo S80 A performance sedan that offers top notch luxury, outstanding handling and so much more.

Boost problems, TCV maybe?

  #1  
Old 11-02-2009, 04:34 PM
imhereftw's Avatar
Senior Member
Thread Starter
Join Date: Jan 2009
Location: Maryland, USA
Posts: 179
Smile Boost problems, TCV maybe?

2004 s80 2.5t

I recently upgraded my muffler, well virtually got rid of a muffler all together, and replaced it with a glass pack.
I notice it picks up a lot better but around 2-3k rpms my car gets jumpy and hesitates as if I'm tapping on the gas petal. I hooked up a boost gauge to see if it might be boost related and as I floor it and my car starts to studder the needle on the gauge bounces up and down from 9 to 13 psi. (tuned btw) I went to check for codes, even though I had no check engine light on, and got nothing.

I called IPD for a little help and they suggested it could be my TCV. Could this be the problem or something else? Note, I never had this problem before taking the muffler off, but ipd and my local mechanic doubt it would be the problem.

Thanks!
 
  #2  
Old 11-03-2009, 08:27 AM
imhereftw's Avatar
Senior Member
Thread Starter
Join Date: Jan 2009
Location: Maryland, USA
Posts: 179
Default

I would really like to figure this out before I go and spend money on something I may or may not need
 
  #3  
Old 11-03-2009, 08:47 AM
Senior Member
Join Date: Oct 2005
Location: Suburban Philadelphia
Posts: 484
Default

Miles?

could be the TCV or the MAP.

I would (personally) replace BOTH.
 
  #4  
Old 11-03-2009, 01:06 PM
imhereftw's Avatar
Senior Member
Thread Starter
Join Date: Jan 2009
Location: Maryland, USA
Posts: 179
Default

It's at 85k miles, I'm going to go through and clean the current TCv with a little carb cleaner see if that makes any difference.
 
  #5  
Old 11-03-2009, 02:41 PM
Senior Member
Join Date: Oct 2005
Location: Suburban Philadelphia
Posts: 484
Default

honestly - not really worth it - the factory ones are not intended to be cleaned. I would strongly recommend replacing it.
 
  #6  
Old 11-03-2009, 05:26 PM
imhereftw's Avatar
Senior Member
Thread Starter
Join Date: Jan 2009
Location: Maryland, USA
Posts: 179
Default Bad line?

well I did clean it just to try it and, nothing =/. I would really like to try and figure something out that doesn't involve spending the money to buy a new one. My brother suggested that I check for leaks. it could be perfectly possible that I tore an old line since I upped the boost output. I'm not exactly sure how to check for leaks though seeing as it's a little different from car to car.

are there any common points of failure I should check as well?
 
  #7  
Old 11-04-2009, 07:05 AM
Senior Member
Join Date: Oct 2005
Location: Suburban Philadelphia
Posts: 484
Default

not a boost leak - if it was you would be experiencing the issue the whole way through the band.

get a new TCV from IPD and replace all your vac lines while you are at it just to be safe.

That said, it could be EITHER TCV or MAP sensor. this one WILL take money to fix
 
  #8  
Old 11-05-2009, 08:18 AM
imhereftw's Avatar
Senior Member
Thread Starter
Join Date: Jan 2009
Location: Maryland, USA
Posts: 179
Default

Alright, I'll try replacing the TCV first because I thought if I were having a problem with the MAP it would give a trouble code.

Thanks for the help so far btw!
 
  #9  
Old 11-05-2009, 08:43 PM
Senior Member
Join Date: Oct 2005
Location: Suburban Philadelphia
Posts: 484
Default

MAP may or may not throw a code - TYPICALLY it does and TYPICALLY they fail in hot weather.
 
  #10  
Old 11-05-2009, 09:32 PM
imhereftw's Avatar
Senior Member
Thread Starter
Join Date: Jan 2009
Location: Maryland, USA
Posts: 179
Default

Originally Posted by Bender View Post
MAP may or may not throw a code - TYPICALLY it does and TYPICALLY they fail in hot weather.
Well the weather here in Maryland is generally pretty mild especially lately and this occurred while the outdoor temps were in 60's and there is no check engine light or idle codes so I'll try replacing the TCV first, even if that isn't the problem sounds like a good upgrade anyways!
 
  #11  
Old 11-06-2009, 02:31 PM
Senior Member
Join Date: Oct 2005
Location: Suburban Philadelphia
Posts: 484
Default

Yeah almost certainly TCV - MAP would (again TYPICALLY) have the code and be a mid summer (july/august) failure.
 
  #12  
Old 11-06-2009, 10:05 PM
imhereftw's Avatar
Senior Member
Thread Starter
Join Date: Jan 2009
Location: Maryland, USA
Posts: 179
Default

Hopefully I can get this on order by this weekend and I'll report back!
 
  #13  
Old 11-13-2009, 08:59 PM
imhereftw's Avatar
Senior Member
Thread Starter
Join Date: Jan 2009
Location: Maryland, USA
Posts: 179
Default

Ok, update.

I've replaced the TCV with IPD's. I bought new vacuum line too but haven't replaced that yet. But since I've replaced it I don't get any more jerkiness and acceleration is smoother then it's ever been! So it appears that that was problem. Thanks for your help, bender.
 
  #14  
Old 11-15-2009, 02:56 PM
Senior Member
Join Date: Oct 2005
Location: Suburban Philadelphia
Posts: 484
Default

my pleasure!
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
tomc761
Volvo 240, 740 & 940
6
04-10-2019 03:57 PM
Holedigger
Volvo XC70
4
12-09-2011 02:54 PM
endneu913
Volvo 850
5
03-28-2010 11:41 PM
AVIATOR83
Volvo S60 & V60
3
03-21-2009 08:55 PM
Lab_Rodent
Volvo S80
14
12-07-2007 06:01 PM


Thread Tools
Search this Thread
Quick Reply: Boost problems, TCV maybe?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.