1.4TDI Boost issues

[andavaka]

Hi Guys,

I have 2003 Polo Classic 1.4TDI (Engine code AMF) i got this car in March with 112 000km on the clock.

The issue is, when driving and you get to a hill while in 5th gear, it loose boost. Which means i have to shut down the engine, restart and proceed. But if i get to a hill and change down to 4th it maintains boost. I have cleared all errors 3times already but it appears this still happens.

[Sinbad]

Hi Guys,

I have 2003 Polo Classic 1.4TDI (Engine code AMF) i got this car in March with 112 000km on the clock.

The issue is, when driving and you get to a hill while in 5th gear, it loose boost. Which means i have to shut down the engine, restart and proceed. But if i get to a hill and change down to 4th it maintains boost. I have cleared all errors 3times already but it appears this still happens.

SO what were the errors you cleared? They could be significant.

[andavaka]

Hi Guys,

I have 2003 Polo Classic 1.4TDI (Engine code AMF) i got this car in March with 112 000km on the clock.

The issue is, when driving and you get to a hill while in 5th gear, it loose boost. Which means i have to shut down the engine, restart and proceed. But if i get to a hill and change down to 4th it maintains boost. I have cleared all errors 3times already but it appears this still happens.

SO what were the errors you cleared? They could be significant.

Actual never check as i got this done at German workshop in Spartan.

[MK2 G60]

Please check what the errors are and then also whats milage.
Check if car has boost leaks and at what rpm does the car go into limp mode?

[Mortar]

I had a similar problem on my 1.4. When u in a high gear and stressing the motor from a low rpm it goes into limp mode and if you keep it in higher rpm its fine.
After taking it in to vw, it was just a boost pipe with a crack in it.

[Pruis]

I have exaclty the same problem with my wifes car.
I am currently checking out if there is a pipe leaking somewhere. But where???
@Mortar: which pipe on yours had a crack in it?

[MK2 G60]

Ok deal with the 1.4 at higher milage they come up with boost errors at low rpm.
They have wastegate trubos not vnt units.Spool speed drops as the engine gets older.
VW say replace engine.

So if the car has no boost leaks or turbo problems and all is fine then get the mapping done.

[andavaka]

How do you check for boost pipe leaks?

[Pruis]

With my research I have come across a guy, who made his own leak tester.
He connects the pipe at the air filter with some plumbing to his compressor, then listen for leaks. It has to be absolutely quite.