TDi 90 '54 plate turbo problem - loss of power

R

rikwill

Guest
Can anybody help with my A2 (Tdi 90) which has developed a serious loss of power problem? I bought it just under a year ago from Audi Derby. I have been driving it daily and I have recently noticed a serious loss of power in 3rd/4th gears around 1500 to 2500 revs. This is particularly noticeable going up hills or trying to accelerate in these gears. I keep having to change down to get any power and there is a deep shudder before the turbo kicks in (it does kick in, but very "late"). The problem is not intermittent - it feels like I am driving with the handbrake on.
Audi recovery have been out today and say there are no faults showing on diagnostic. The RAC guy reported "no fault codes found - turbo seems noisy when coming in to play and seems too high in rev range".
My Audi warranty only lasts for another 2 weeks (I thought I was out of warranty but checked today) and I am keen not to be fobbed off by Audi - the car is going to Audi Manchester on Monday morning to be checked out.
So far it appears from other posts that this problem could be:-
Split intercooler core
Blown hoses
Sticking/faulty turbo
Injector wiring loom
Fuel filter blocked
Does anybody have any other suggestions please - I have read that the Tdi 90 does have frequent turbo problems? Thanks for your help.........
PS It's got 46,000 miles on the clock
 
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Sounds a bit like the MAF as well - when the MAF goes, it feels like you only get power from the first 20% of the throttle pedal, and any further down has no effect.

I personally find the MAF (on my previous VW & Audi TDis, none of them an A2) tends to go between 150-200k miles. However, if any oil has contaminated it, it will go immediately (for example, an oil-impregnated paper air-filter). You can sometimes clean them rather than replacing them, by using zero-residue circuit cleaner spray.
 
Could well be sticking vanes on the turbo, the 90 seems to have trouble with that. Get it checked thoroughly ASAP.
 
It all depends on how much you want to do your self!

I would start with the two rubber pipes as these are easy to remove and check for tiny hoes or small splits in the hoses.

Next, check the intercooler joints.

I would be surprised if the turbo has gone west with this low mileage.
90% of turbos can be refurbished so don't buy a new one.

your problem is more than likely a air leak so the turbo over boost and then shuts down for self protection.

If you stop and remove the key then restart it will reset it's self?

This is getting to be common problem and you will see a lot of posts over last year.

Darren
 
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