Got boost? cuz i dont.

**Quattrocket** · 11-02-2005 01:48 PM

dont SEARCH button me please. I dont have the time or the patience to go throughb hours of searching
Ive got like 3-4 lbs of boost and cant find where my leak is. I will try the tennis ball method but I would like you guys to post potential/ most common areas of vacuum leaks. also, would an exhaust leak causr this kind of loss of boost?

**k0mpresd** · 11-02-2005 01:53 PM

did it all of a sudden just quit making boost and drop to 3-4lbs?

**SeanF** · 11-02-2005 02:01 PM

limp mode

**goldenchild** · 11-02-2005 02:07 PM

limp doesnt do 3-4 it does 5 and im sure he knows what the hell limp mode is

**BranCKY3** · 11-02-2005 02:40 PM

Check the L shaped hose by the top of the intake manifold.

**offroader1006** · 11-02-2005 02:41 PM

the diff from 3-5 isnt that great, could be limp mode.

common leaks are the DV to manifold line in front of the TB cover, the FPR line on the back of the intake mani, and any lines you may have run

**SeanF** · 11-02-2005 02:51 PM

Originally posted by goldenchild
limp doesnt do 3-4 it does 5 and im sure he knows what the hell limp mode is

wow, ass...

ive seen guages that sit 3psi off from where they should be... 1-2psi is minimal, get over yourself...

**EVIL-AUDI** · 11-02-2005 02:53 PM

Could very well be in Limp. You really just need to get it Vag'd

**BarryT82** · 11-02-2005 02:57 PM

My buddies GTI did that when he blew the turbo.

**nizmosx** · 11-02-2005 02:59 PM

Originally posted by BranCKY3
Check the L shaped hose by the top of the intake manifold.

WHAT HE SAID

**Eurotuned_A4** · 11-02-2005 03:11 PM

well, first off...what is you vac reading on your boost gauge? it should be like 20-22.

**k0mpresd** · 11-02-2005 03:40 PM

for everyone that says check all these small hoses..do you realize how much of a leak there has to be for it to leak 10+ psi of boost??(assuming hes chipped)

it would have to be an IC hose blown off

ive blown hoses part way off before and still get 5psi..a split L shaped hose or a torn fpr line isnt going to leak 10psi

sounds like limp mode...espicially since we're getting into the colder months, the ecu might not have adapted yet and still be requesting a few psi too much

**bitterchild** · 11-02-2005 03:41 PM

if the car drives fine other than the low boost pressure than it is likely limp. You could always pull the battery to see if you get boost pressure back at least for a short time.

**offroader1006** · 11-02-2005 05:21 PM

Originally posted by k0mpresd
for everyone that says check all these small hoses..do you realize how much of a leak there has to be for it to leak 10+ psi of boost??(assuming hes chipped)

it would have to be an IC hose blown off

ive blown hoses part way off before and still get 5psi..a split L shaped hose or a torn fpr line isnt going to leak 10psi

sounds like limp mode...espicially since we're getting into the colder months, the ecu might not have adapted yet and still be requesting a few psi too much

doesnt mean there isnt a leak. is it really that hard to listen for a leak and check 2 hoses? probably is limp mode, but id still check the hoses.

**Quattrocket** · 11-03-2005 12:35 AM

Originally posted by Eurotuned_A4
well, first off...what is you vac reading on your boost gauge? it should be like 20-22.

Yeah, im reading 21 for VAC.

**Quattrocket** · 11-03-2005 12:36 AM

Originally posted by 1.8.se7en
limp mode

I thought of limp mode, but doesnt that only happen when there is a check engine light???

**sumpsfast** · 11-03-2005 12:50 AM

Wierd question man, I almost posted and asked this tonight before I disconnected the battery and did the throttle body adaptation. I was DEFINITELY in limp mode and had no CEL!!!

**Quattrocket** · 11-03-2005 01:11 AM

Also, i am not chipped yet. GIAC PC-16 this weekend though, WOOOOOT!

**94jedi** · 11-03-2005 06:23 AM

Originally posted by Quattrocket
Also, i am not chipped yet. GIAC PC-16 this weekend though, WOOOOOT!

You won't like the pc-16 file....so why don't you sell it to me?

Looks like limp mode for you man.

**k0mpresd** · 11-03-2005 06:39 AM

Originally posted by Quattrocket
I thought of limp mode, but doesnt that only happen when there is a check engine light???

no, limp mode will not through a cel

disconnect your battery for 5 mins or so

**SeanF** · 11-03-2005 06:54 AM

make sure you know your radio code...

**RedRocket** · 11-03-2005 07:02 AM

Umm, don't you have an AEB Quattro? If so you won't have limp mode, nor will you have that L shaped hose by the intake. Unless people were talking about the IC hose...

**Eurotuned_A4** · 11-03-2005 07:24 AM

so AEB doesnt go into limp?

**RedRocket** · 11-03-2005 07:32 AM

Originally posted by Eurotuned_A4
so AEB doesnt go into limp?

Yes, the throttle is by cable. AEB's don't go limp. If it were possible, I'd have been there already.

**juju4uofa** · 11-03-2005 07:46 AM

So true RedRocket. If he's about to go PC-16 that means he's pre '00 and therefore NDBW. So unless I'm mistaken his car doesn't have a limp mode.

**RedRocket** · 11-03-2005 07:48 AM

Originally posted by juju4uofa
So true RedRocket. If he's about to go PC-16 that means he's pre '00 and therefore NDBW. So unless I'm mistaken his car doesn't have a limp mode.

Ya, and I've seen his engine with my own two eyes

**RedRocket** · 11-03-2005 07:49 AM

Quattro, are you comming to the cruise this Sunday? I will have my VAG USB there.

**k0mpresd** · 11-03-2005 07:51 AM

Originally posted by RedRocket
Yes, the throttle is by cable. AEB's don't go limp. If it were possible, I'd have been there already.

just because its dbc doesnt mean the TB doesnt have a motor bolted to the side of it...

the ecu can still make decisions for you

**RedRocket** · 11-03-2005 07:55 AM

Originally posted by k0mpresd
just because its dbc doesnt mean the TB doesnt have a motor bolted to the side of it...

the ecu can still make decisions for you

that's true. Be we dont' go limp

**k0mpresd** · 11-03-2005 08:03 AM

the ecu can still close the throttle though and limit boost that way

**RedRocket** · 11-03-2005 08:22 AM

Originally posted by k0mpresd
the ecu can still close the throttle though and limit boost that way

I don't know about that. The throttle is manipulated through a second rod on the throttle body that is operated by vacume correct? This is for Anti-stall and Cruise control. If it were able to reverse the vacume function by pressurizing that diaphram on the bottom, it would be working against the force of your foot.

So if he was experienceing throttle cut, he would feel something overpowering the accelerator pedal. I don't think this is likely what is happening. Know what I mean?

Of course you can understand why this is not the case in DBW cars.

**k0mpresd** · 11-03-2005 08:26 AM

Originally posted by RedRocket
I don't know about that. The throttle is manipulated through a second rod on the throttle body that is operated by vacume correct? This is for Anti-stall and Cruise control. If it were able to reverse the vacume function by pressurizing that diaphram on the bottom, it would be working against the force of your foot.

So if he was experienceing throttle cut, he would feel something overpowering the accelerator pedal. I don't think this is likely what is happening. Know what I mean?

Of course you can understand why this is not the case in DBW cars.

yea..i see what youre saying

it just seems kind of strange that he has perfect vacuum, cant find a blown IC hose, and is losing boost..

**RedRocket** · 11-03-2005 08:38 AM

Well the vac is from throttle to cyclinders right...

I think he should to a TBA. I had a problem like that and it turned out the ECU was unable to adjust the TB. I ended up getting a used ECu from a junk yard and it fixed it. Weird.

He can't even read bost requests i don't think because it's an AEB. At least in 97(my car) the AEBs don't have that feature.

I would suspect a leak with around the DV since he just put in a forge. It won't be the vac line on the top of the dv, unless it's fitted in a way that it allows vacume but not boost. This is going with most likely.

Less likely, assuming something happened to go wrong at the same time he made a change to the car, I would either suspect throttle issues, or N75 maybe. What would you guess komp?

Interesting enough, my car would only boost at like 10 Psi cause the car was only reading 73% at the throttle on WOT with the bad ECU. When it should read like 85%.

**k0mpresd** · 11-03-2005 08:57 AM

im betting on his boost leak had something to do w/ the dv he installed which progressed into it deciding it was going to blow itself off the hose

he never did say whether it just all of a sudden lost boost or whether it got worse over time..

**RedRocket** · 11-03-2005 09:13 AM

^^^ya me too. If he doesn't have it solved by Sunday, I will stick my VAG in and have a look. I'm getting better with the VAG, do you have any suggestions or know and specific blocks I can measure? Keep in mind I'm not sure if he has requested boost.

**Quattrocket** · 11-03-2005 01:13 PM

Originally posted by RedRocket
Quattro, are you comming to the cruise this Sunday? I will have my VAG USB there.

If the install goes well this saturday, I will be out for sure. But I have a feeling its goona drag into sunday.

**RedRocket** · 11-03-2005 01:19 PM

Originally posted by Quattrocket
If the install goes well this saturday, I will be out for sure. But I have a feeling its goona drag into sunday.

Are you sure the K04 is welded up nicely? no leaks? And be sure to have all the new gaskets and non reusable nuts to be on the safe side. Are you installing yourself?

**Quattrocket** · 11-03-2005 01:22 PM

Originally posted by k0mpresd

he never did say whether it just all of a sudden lost boost or whether it got worse over time..

Ive actually had boost problems for quite a while. somedays theres a little more boost than others. ive also replaced a bunch of vac lines a couple weeks ago but nothing has gotten better.