Problem when Accelerating

davidb1988

davidb1988

Registered User
Joined
Jan 28, 2014
Messages
15
Reaction score
2
Points
3
Location
Lowestoft, Suffolk
Hi there.

Just looking for some guidance. Still new to Audi's and even more new to Turbos!
Got a problem with my car that has developed. I manage to start the car fine, it runs fine and when not in gear or anything if I rev it I get the dial to the red no problem.

However when driving along, as soon as I put my foot down from 2nd gear upwards the car stops accelerating and violently judders, as if I could smash my head on the windscreen sometimes, because it wont get passed 3000 revs under normal acceleration. If I accelerate heavy it is about 2500 revs. The turbo goes crazy and you can hear this in the video below. The boost gauge shows the needle go off the scale and when I am accelerating and this is happening the needle is like trying to force itself to go more by constantly vibrating at the highest it can.

I have done a video to show you and let you hear what is happening from inside the car. I'm sorry it is not the best, in fact, pretty rubbish quality but was filmed holding a phone at 1am in the morning lol.

Appreciate any help etc and sorry if I have missed a thread with someone with the same problem!

 
Last edited by a moderator:
s3dave said:
Weird, looks like fuel cut..? or an hard limp mode any fault codes?
Click to expand...

Yeah weird I know lol!
Hmmm I thought something to do with fuel, but then engine continues to run fine and doesnt sound like its cutting out. Just as if overboosting but not sending power. Make sense?

Haven't actually got a VAGcom or hooked it up to one yet, dont know anyone near me who has one so may have to see a garage. But thought would ask you guys first.
 
The car is quite cold looking at the temp gauge on your vid, does this happen when the car is warm as well??

It could be a faulty N75 valve, although that is a quite extreme form of the limp mode.

Try disconnecting it and see if that makes any difference at all.
 
Nilz said:
The car is quite cold looking at the temp gauge on your vid, does this happen when the car is warm as well??

It could be a faulty N75 valve, although that is a quite extreme form of the limp mode.

Try disconnecting it and see if that makes any difference at all.
Click to expand...

Yeah it was only 1*c outside.
It does seem to do it when it is warm yeah, but not at 2500, just 3000 revs then.

Ok will disconnect the N75 then and give that a try :)
 
Don't drive it like that at all till you have sorted what the problem is , If the boost gauge is going off the end of the scale then you have some serious issues that will lead to turbo failure quite quickly.The engine is telling you there is a serious problem but you seem to be ignoring that.
Has somebody fitted one of those stupid manual boost controllers ? .

Karl.
 
davidb1988 said:
The boost gauge shows the needle go off the scale and when I am accelerating and this is happening the needle is like trying to force itself to go more by constantly vibrating at the highest it can.
Click to expand...

???

What is it you're driving? A3/S3? What year?
It seems something is failing pretty badly to be honest. Some more info would be useful though.

I would stop driving it until you've figured out what the problem is..
 
vivalacoulter said:
Could be worth trying the MAF sensor after you've tried the N75 too.
Click to expand...

Have replaced the MAF with a brand new Bosch one so not that.

desertstorm said:
Don't drive it like that at all till you have sorted what the problem is , If the boost gauge is going off the end of the scale then you have some serious issues that will lead to turbo failure quite quickly.The engine is telling you there is a serious problem but you seem to be ignoring that.
Has somebody fitted one of those stupid manual boost controllers ? .

Karl.
Click to expand...

Hey Pal, As far as I am aware no. Where would I check to see if they have?
It is not a daily driver atm until I get this issue fixed. It was simply only driven then to be able to record that video to show you guys what happened. Literally that was just outside of my house.

Spatula said:
???

What is it you're driving? A3/S3? What year?
It seems something is failing pretty badly to be honest. Some more info would be useful though.

I would stop driving it until you've figured out what the problem is..
Click to expand...

Its a A3 1.8T 2000 year.
I had a hunch something must be failing badly :S
 
davidb1988 said:
Im in Lowestoft, Suffolk, most easterly point of uk lol
Have got a mate close by who might be able to get hold of a VAGcom so hopefully he can.
Click to expand...

Might be worth haven a look on the vcds map and see who is close to you and send a little pm
 
Nilz said:
The car is quite cold looking at the temp gauge on your vid, does this happen when the car is warm as well??

It could be a faulty N75 valve, although that is a quite extreme form of the limp mode.

Try disconnecting it and see if that makes any difference at all.
Click to expand...

Just to let you know, even with the N75 disconnected it not made a difference.
 
OK mate, its really worth getting the car scanned to see if there are any faults and that will help you along the way.
 
Yes I can't figure it out so going to book it into badgers next week if no has the answer lol
 
Audi_A31.8T said:
Yes I can't figure it out so going to book it into badgers next week if no has the answer lol
Click to expand...

I have a mechanic looking at mine tonight so fingers crossed he can find something. If not got a VCDS on Saturday and will then also hopefully get it sorted!
 
You must log in or register to reply here.

Similar threads

G
pause when accelerating
Replies
7
Views
1K
Welly
Welly
S3KO4
Blue smoke when accelerating!
Replies
42
Views
36K
hillary2005
H
C
Hissing sound when accelerating
Replies
17
Views
29K
jwb7
J
S
Lack of power when accelerating
Replies
3
Views
798
HTC
HTC
Sm3g
Problem when indicating!!
Replies
12
Views
954
s3 Hoggy
s3 Hoggy
Top
Back