Question about Audi Quattro

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Turbo problems hi everyone my names alvin i live in jhb. i have a problem with my audi s3. currently it is boosting at 1.4 bar but as i drive through the gears like from 1 to 2 the boost drops rapidly like all the way down to .6 or so. could sum one plz help me out with this problem. my email address is virus.powa@yahoo.co.uk

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Vacuum issue that would need a Audi Mechanic trouble shoot.

Posted on Jun 06, 2008

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My Audi 1997 A4 1.8T Quattro dosent boost when I hit 3000 revs, it cuts out like Im red lining. Why is that?


Hi Ken, I believe you should take the vehicle for a diagnostic scan. It sounds as if the dump gate is defective and opening too soon and therefore not developing the boost required. The problem could also be related to a defective signal received by the management system and closing the injection system too early. Regards John

Jun 24, 2012 | 1997 Audi A4

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Audi allroad 2.7 turbo over boosting


Hi Patric, You have a problem with the turbo gate dump valve. I would suggest replacing the whole unit. Regards John

Apr 25, 2012 | Audi AllRoad Cars & Trucks

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A4 2.5tdi quattro tiptronic 180 bph 2002 .put in 4 new intercoolers in it the last year.The intercoolers are bursting open when excelerating,


Hi
More than just bad luck i suspect. Problem will almost surely be turbo overboost. Possible causes, wastegate jammed, actuator siezed, boost sensor inop. Best advice is to have fault codes and live data read with a suitable scan tool to determine the exact cause of the overboost condition. Easy enough job for competent garage.

Regards
Martin

May 29, 2011 | Audi A4 Cars & Trucks

1 Answer

Audi diagnostic lists an over boost - what does this mean ?


It needs a turbo.

The oil overfill might well be the cause of the smoke. It will be nothing to do with the overboost. That is quite a common fault and at the main dealers, Audi for me, we usually replace the turbo for that. You need to check the N75 and all the vacuum pipes etc, but when they go you dont get enough boost, when you get to much 99% of the time its the Turbo.

We arent aloud to take turbo's aparts, But In the real word I would suggest you look into having the turbo rebuilt. It is a variable vain turbo and the vains and or the actuator that control them get stuck, which causes this problem. I assume you recently purchased the vehicle, because its very common when its intermittent, for people to see that fault code, know a turbo is £1000 and sell the car.

You can drive around the problem usually, by keeping the revs up. Pulling full throttle from low rpm will bring it on more, thats how we test them.

Oct 12, 2009 | 2006 Audi A4

4 Answers

My Audi A3 2.0 tdi limp mode/turbo overboost


i also have done a diagnostic test and it states a turbo overboost condition and it drives fine locally but loses power on the motorway and struggles to reach 80mph? any suggestions please email me at shiz86@hotmail.co.uk

Apr 21, 2009 | 2005 Audi A3

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