killerabbit
20-05-2009, 08:12 AM
Hello there,
First post and its a real doozy.
I have a 1999 Audi S4 biturbo, about a 2 month ago id noticed that the S4 was starting to loose boost at the higher revs and that the power was just dropping off at about 4000rpm, this has never been a problem before but i took it to the garage anyway where i was shown that the Dumps were not holding a vaccuum and letting off and that this was most likely the cause. I was told to come back in a week when the parts arrived.
On the way to the garage to have them fitted i hear a very sudden blow out of air rapidly leaving a pipe(sort of like a ballon being let down very fast) and since i have had practically no boost. When taken to the garage she was boosting at 0.2bar, unusualy low. We proceeded to inspect and found the CV boot was torn and was quickly replaced. this however did not solve the problem and in fact i started having very low whinning noises coming out of her, these low whinning was put down to the tubro bearing gone and was in the early stages of failure which we thought would explain the complete lack of boost.
So finally the turbo bit the dust and went about a week later, smoke and all. and have since been replaced with stock OEM K03s as well as the associated pipes and gasgets costing around £900 and all been put back together. But the problem is still there. The whine has gone but the car still only boosts at 0.2bar.
No this we are stumpt on, we have found no splits/tears in any of the pipes. intercoolers are all ok, and no faults being shown onthe diagnostics. The only recomendations so far are that a sensor has gone down and not shown up (take your pick what that could be) or the ECU is faulty.
I am really getting desperate now as this is costing a fortune to keep trying things that dont work, has anyone experienced anything similar or knows of any possibilities it may be?
Thanks in advance
Billy
First post and its a real doozy.
I have a 1999 Audi S4 biturbo, about a 2 month ago id noticed that the S4 was starting to loose boost at the higher revs and that the power was just dropping off at about 4000rpm, this has never been a problem before but i took it to the garage anyway where i was shown that the Dumps were not holding a vaccuum and letting off and that this was most likely the cause. I was told to come back in a week when the parts arrived.
On the way to the garage to have them fitted i hear a very sudden blow out of air rapidly leaving a pipe(sort of like a ballon being let down very fast) and since i have had practically no boost. When taken to the garage she was boosting at 0.2bar, unusualy low. We proceeded to inspect and found the CV boot was torn and was quickly replaced. this however did not solve the problem and in fact i started having very low whinning noises coming out of her, these low whinning was put down to the tubro bearing gone and was in the early stages of failure which we thought would explain the complete lack of boost.
So finally the turbo bit the dust and went about a week later, smoke and all. and have since been replaced with stock OEM K03s as well as the associated pipes and gasgets costing around £900 and all been put back together. But the problem is still there. The whine has gone but the car still only boosts at 0.2bar.
No this we are stumpt on, we have found no splits/tears in any of the pipes. intercoolers are all ok, and no faults being shown onthe diagnostics. The only recomendations so far are that a sensor has gone down and not shown up (take your pick what that could be) or the ECU is faulty.
I am really getting desperate now as this is costing a fortune to keep trying things that dont work, has anyone experienced anything similar or knows of any possibilities it may be?
Thanks in advance
Billy