Scania loss of power when accelerating

Loss of power when accelerating

Hello,

I didn't have to take part for a long time!

But now the time has come.

My Tiguan 1.4 TSI has now run 20,000km. Little to complain about, except for the squeaking when accelerating. But is noted in the workshop.

Are on the way home from vacation (Allgäu) yesterday.

Refueled in the Spessart, followed by a half-hour break.

Car runs great up to here.

After starting to drive on the acceleration lane strongly accelerated. Suddenly no more power, no acceleration possible, a lot of white smoke from the exhaust.

The engine emblem briefly flashes twice in the display and was about to stop.

But then, throttle off, switched on and accelerated normally.

The car is running normally again.

Tried the acceleration in another parking lot again. everything normal too.

No more problems, the car is running like a one again.

Who had similar problems, who can give me information about the cause ????

Thanks Rueag

Best answer on the topic

Hello Rueag

this behavior is caused by condensation in the intercooler.

The cold airflow causes the water to condense and freeze in the intercooler

and the hoses after the turbocharger. Due to the break, the accumulated heat could

thaw the ice in the engine compartment. After the engine started, the water was then

promoted beyond the combustion to the exhaust, then it stood again

the normal engine power is available.

greeting

southwest

Similar issues
16 answers

Hello Rueag

this behavior is caused by condensation in the intercooler.

The cold airflow causes the water to condense and freeze in the intercooler

and the hoses after the turbocharger. Due to the break, the accumulated heat could

thaw the ice in the engine compartment. After the engine started, the water was then

promoted beyond the combustion to the exhaust, then it stood again

the normal engine power is available.

greeting

southwest

Thank you for your detailed and competent statement.

But I will still drive to the workshop and have it read out.

Let's see what the master knows.

thanks again

Rueag

Hello Rueag,

I don't want to scare you, but with the same side effects, my turbocharger was defective.

In the meantime I already have the 2nd turbocharger at 48000 km !!

I hope it's nothing bad.

Greetings KSMS4

Hello,

initial feedback after my visit to the workshop.

The fault memory was read out and only a sporadic fault was detected.

The sensor located below the turbocharger has registered this.

Thanks to Suedwest, the workshop foreman is also based on your assumption. According to his statement, I have nothing to fear.

Nonetheless, I would like to receive and accept further comments on the subject.

Rueag

Hello,

have about the same problem as "Rueag".

I've had something like this before, but now the problem is like this:

From 3,500 rpm, the power drops noticeably, as if you lifted the accelerator pedal.

That's around 140 km / h in 6th gear.

The same for all gears and always at 3,500 1 / u.

When does the turbo start? At 3,500 1 / u? The compressor is responsible for this.

No warning light comes on.

What could that be?

1.4 TSI engine (150PS), manufactured in 12/2007

greeting

Thomas

Quote:

When does the turbo start?

The turbo runs almost all the time. Is only supported by the compressor, but if not much is possible from 3500rpm, this indicates a problem with the turbo or the compressor is not decoupled gently.

Hello,

there is a lack of power, so I don't think that the compressor is not being "decoupled" properly.

I once read somewhere that it could be a sensor on the turbo.

Boost pressure regulator?

Diverter valve?

from here:

click -----------------------------------

Maybe I have to have the error read out, if it is saved.

Just thought, maybe someone already had something like that, then I can point it out to my car mechanic (independent workshop).

Hello,

can someone show me (pictures, plan) where the two valves are located?

Maybe I'll expand it myself.

Can you somehow check whether they are defective?

greeting

Thomas

Hello,

the solenoid valve on / for the turbo depends on and off.

Can someone tell me what the valve is installed on?

Can a "talented" screwdriver change it himself?

greeting

Thomas

Hello,

have to bring it up again ...

Nobody knows where the solenoid valve is located and how it is changed?

I'm probably the only one who has a loss of performance (from 3,500 1 / u)?

The valve now hangs constantly and can accelerate to a maximum of 140 km / h

greeting

... You won't be the only one who has such a problem - but all these people are probably not going to read your post and reply to it ... (there are also driving and problems outside of forums) ;-)

I would still ask in a workshop instead of bothering about it.

Take it slowly ... If it's too much for you, don't answer ;-)

The workshop wants over 250 euros, the part itself costs perhaps 40 euros.

Since I don't have two left hands, I simply ask myself whether you can change it yourself.

Hello,

I had the same problem. No feed on the motorway at 3200 rpm. White smoke from the exhaust. For me the turbo has said goodbye !!!!

greeting

Guido