Audi 1.9TDi Quattro Avant

**Bobkat** · 21-02-2008,11:02 AM

Hi All,

I have a 1.9tdi Audi A4 Quattro Avant 98 model. There is an intermittent problem whereas when I go over 3000 revs the turbo seems to lacking!!! However if you switch the car off it rectifies itself. This happens now & again but lately it is more frequent! I have had a diagnostic but no faults were found. Can anybody help?? I have been told the car seems to be going into safe mode?? Which I don't know why

**avspider** · 24-02-2008,10:04 PM

Hi, did you find the fault? As i've got an identical problem on my '96 A4 tdi

**Bobkat** · 24-02-2008,10:45 PM

No,

I'm still waiting for a positive reply but I was told by a mechanic that it could be something to do with the manifold sensor????

**adele562** · 27-02-2008,05:58 PM

Hay, did any of you solve the problem with audi? im having similar problems with my a4 avant! i have tried almost everything so would be greatful if you could let me know

if not i can let you know what i have done to my car to save you both money lol
adele

**Bobkat** · 27-02-2008,06:13 PM

Hi Mate,

Still nothing - I had a diagnostic on it & this did not bring up anything!!!

Any help would be appreciated - Thanks Bobby

Emily's dad · 27-02-2008,06:32 PM

It sounds like the turbo overboost problem I had.

It has been mentioned in other threads and on other forums which deal with VW/AUDI 1.9TDI engines.

A quick search of the phrase overboost should bring up some suggestions

Dave.

**adele562** · 27-02-2008,06:39 PM

my car is cutting out now when i rev over 3rpm

it dropped a valve so i got all that fixed and 300 miles later the same thing happened i got a new engine and it still wont rev over 3rpm, the new engine was checked in the old car and ran fine!!! ive also had the ecu tested and nothing!

**adele562** · 28-02-2008,10:44 PM

you should change the air flow meter and see if that helps

**Bobkat** · 29-02-2008,10:53 AM

Air Flow Meter has been changed! We have the same problem on my Dad's VW Passat Sport so this must mean it is a common fault which Audi & Volkswagen know about

**adele562** · 29-02-2008,01:11 PM

i know its not the turbo or anything on the engine as its had an engine change, i have phoned people up and down the contry and no audi expert seems to know the problem, but from reading most of the threads ion this i find that hard to belive! i am refusing to take the car to audi simply because of the cost but its looking as though im going to have to! have you checked all the hoses to the turbo? mine has got be a damaged wire or conector as ive also had the ecu sent away to a company in sheffield and it came back as new ???