A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

HELP! No boost?

Thread Tools
 
Search this Thread
 
Old Nov 14, 2002 | 04:56 PM
  #1  
skoorbevad's Avatar
Thread Starter
AudiWorld Member
 
Joined: Mar 2001
Posts: 312
Likes: 0
Default HELP! No boost?

I sort of posted something similar earlier, but I'm kind of stumped as to what could be going on, so I'm posting again for the evening crowd.

My car is a 1999.5 1.8TQm. It's GIAC chipped. Normally, it's got that satisfying Zwing! at about 3K on the tach. As Im driving to work (and home from work this evening), its not there. It feels like the car hasnt been chipped at all.

Im wondering what the symptoms of a faulty BPV would be. Does a faulty valve just make the boost more unpredictable, or feel like its not coming on at all? I cant notice anything. It feels bone stock.

I've verified that theres probably nothing goofed with the ECU, my rev limiter is still set to 7k. (hehe) The car runs smoothly otherwise... just no boost!

The only other thing Ive changed is that last night I filled up with QuikTrip 93 Octane instead of my normal Chevron Supreme. I'd think QT gas would be acceptable at worst -- would running a mislabelled gas (i.e., it said 93, maybe it was 87 cause the car to feel like its just got 0 boost?

Man, this is depressing. Can anybody give me any clues? Im probably going to run this tank down and go back to Chevron just to verify, but Im afraid Im going to have to take it up to Eruotech Atlanta and have Brian take a look if I can get any good ideas here.

Thanks!
Dave
Reply
Old Nov 14, 2002 | 05:00 PM
  #2  
Rack 'em Willie's Avatar
AudiWorld Super User
 
Joined: Mar 2002
Posts: 10,438
Likes: 0
Default

Did you try a search to see if anyone else has had similar problem?
Reply
Old Nov 14, 2002 | 05:01 PM
  #3  
paul_858's Avatar
AudiWorld Expert
 
Joined: Apr 2001
Posts: 30,883
Likes: 1
Default

blown hose, torn hose, bad bpv but usually you get boost spikes. limp mode etc.
Reply
Old Nov 14, 2002 | 05:04 PM
  #4  
Skene @ PES Tuning's Avatar
Elder Member
 
Joined: May 2001
Posts: 11,031
Likes: 1
Default do you have a boost gauge?

do you have a vag com?
things like that help diagnose problems.
Reply
Old Nov 14, 2002 | 05:05 PM
  #5  
skoorbevad's Avatar
Thread Starter
AudiWorld Member
 
Joined: Mar 2001
Posts: 312
Likes: 0
Default Nope.. :/

Yeah, dont have either, thats why Im kind of poking. May have to get Eurotech to take a look if nothing else...
Reply
Old Nov 14, 2002 | 05:06 PM
  #6  
skoorbevad's Avatar
Thread Starter
AudiWorld Member
 
Joined: Mar 2001
Posts: 312
Likes: 0
Default

What exactly is limp mode?
Reply
Old Nov 15, 2002 | 05:59 AM
  #7  
Liam in Montreal's Avatar
Elder Member
 
Joined: May 2000
Posts: 17,768
Likes: 0
Default

plug vag-com...install boost gauge...no boost = no turbo
Reply
Old Nov 15, 2002 | 08:19 AM
  #8  
paul_858's Avatar
AudiWorld Expert
 
Joined: Apr 2001
Posts: 30,883
Likes: 1
Default

not too sure that the 99.5 have boost sensors.
Reply
AudiWorld Stories

Bringing Audi to Life for Audi Fans

story-0

New Audi A6 Allroad Is The Market's Coolest Wagon: 9 Things to Know

 Pouria Savadkouei
story-1

10 Strangest Audi Designs That Actually Made Production

 Joe Kucinski
story-2

2027 Audi Q7 and SQ7: Audi Upgraded EVERYTHING!

 Michael S. Palmer
story-3

Audi Unveils Absurdly Cool New Supercar: 10 Things You Need to Know!

 Verdad Gallardo
story-4

The Highs & Lows of Every Audi C-Class Generation

 Joe Kucinski
story-5

Top 10 Most Expensive Audis Ever Sold on Bring-A-Trailer

 Brett Foote
story-6

10 Audi Features & Options We Miss the Most!

 Joe Kucinski
story-7

Audi Recreates Crazy-Looking Speed Record Breaker From 1935

 Verdad Gallardo
story-8

Coachbuilder Recreates the 1995 Audi TTS Concept

 Verdad Gallardo
story-9

Every Audi V10 Car Ranked!

 Joe Kucinski
Old Nov 15, 2002 | 11:39 AM
  #9  
Liam in Montreal's Avatar
Elder Member
 
Joined: May 2000
Posts: 17,768
Likes: 0
Default boost sensors?

if a vag-com won't give him fault codes and he is not making boost (gauge), then his turbo is kaput, simple really
(this is assuming he's checked if all the hoses are in place)
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Craigito
A4 (B5 Platform) Discussion
5
Sep 9, 2006 09:33 PM
skoorbevad
A4 (B5 Platform) Discussion
2
Nov 14, 2002 10:51 PM
bradsky77
S4 / RS4 (B5 Platform) Discussion
6
Aug 27, 2002 10:45 PM
Jason Chen
TT (Mk1) Discussion
7
Nov 29, 2001 10:21 AM
NickS
S4 / RS4 (B5 Platform) Discussion
21
Nov 1, 2001 04:29 PM




All times are GMT -8. The time now is 01:15 PM.

story-0
New Audi A6 Allroad Is The Market's Coolest Wagon: 9 Things to Know

Slideshow: Audi's latest A6 Allroad gets RS-style fenders, real off-road hardware, and enough personality to stand out in a market obsessed with crossovers.

By Pouria Savadkouei | 2026-06-16 17:31:52


VIEW MORE
story-1
10 Strangest Audi Designs That Actually Made Production

Slideshow: 10 strangest Audi designs that actually made production

By Joe Kucinski | 2026-06-10 16:32:29


VIEW MORE
story-2
2027 Audi Q7 and SQ7: Audi Upgraded EVERYTHING!

Slideshow: Everything you need to know about the 2027 Audi Q7 and SQ7

By Michael S. Palmer | 2026-06-09 06:02:56


VIEW MORE
story-3
Audi Unveils Absurdly Cool New Supercar: 10 Things You Need to Know!

Slideshow: Limited to just 499 units, the 987-horsepower halo car signals a new chapter for Audi performance.

By Verdad Gallardo | 2026-06-04 17:37:15


VIEW MORE
story-4
The Highs & Lows of Every Audi C-Class Generation

Slideshow: The highs and lows of every Audi C-Class generation.

By Joe Kucinski | 2026-05-27 16:05:50


VIEW MORE
story-5
Top 10 Most Expensive Audis Ever Sold on Bring-A-Trailer

People were more than happy to shell out big bucks for these cars.

By Brett Foote | 2026-05-27 15:32:23


VIEW MORE
story-6
10 Audi Features & Options We Miss the Most!

Slideshow: 10 Audi features and options we miss the most.

By Joe Kucinski | 2026-05-12 19:33:47


VIEW MORE
story-7
Audi Recreates Crazy-Looking Speed Record Breaker From 1935

Slideshow: Audi has recreated one of the wildest machines of the pre-war speed-record era, reviving a streamlined V16 racer that originally exceeded 200 mph in 1935.

By Verdad Gallardo | 2026-05-11 09:49:34


VIEW MORE
story-8
Coachbuilder Recreates the 1995 Audi TTS Concept

Slideshow: A Dutch coachbuilder has reimagined the original Audi TT by finishing what the 1995 concept only hinted at.

By Verdad Gallardo | 2026-05-05 15:17:58


VIEW MORE
story-9
Every Audi V10 Car Ranked!

Slideshow: Ranking every Audi V10 road car

By Joe Kucinski | 2026-04-29 16:11:56


VIEW MORE