Loud Engine Noise at High RPM - Troubleshooting

Hello.

Since yesterday afternoon, after a long drive on the highway, I've been hearing a loud noise when I accelerate fully. It's most noticeable when I briefly accelerate hard at low RPMs. The noise sounds like something is either blowing or sucking very strongly.
The vehicle is a Volkswagen Golf 3 TDI with the AFN engine.
Vagcom is reporting the following error codes for the Climatronic system:

2 errors found:
00779 - Vertical acceleration sensor (G90)
30-10 - Intermittent connection or short circuit after the positive terminal.

00281 - Throttle valve actuator (V60)
35-00 - -

The first error code appeared today, after I replaced the outdoor temperature sensor. So, it probably has nothing to do with that.

Can someone help me, or do I need to take it to a repair shop?

Thank you.

Best regards.

Luc.

trulala wrote:

Since yesterday afternoon, after a long highway drive, I've been experiencing a loud noise when I accelerate fully. It's most noticeable when I briefly accelerate hard at low RPMs. The noise sounds like something is either blowing or sucking very strongly

.

Hi.

"This is typical for leaks in the intake manifold area between the turbocharger and the engine."
I would fix this quickly (and only drive very slowly until the repair is done) before the "useless" loader is ruined due to over-revving.

Quote:

Vagcom reports the following error codes for the Climatronic: 2 errors found: 00779 - Vertical acceleration sensor (G90) 30-10 - Intermittent connection or short circuit after the positive terminal. 00281 - Throttle valve actuator (V60) 35-00 - - The first error was only logged today, after I replaced the outdoor temperature sensor. So, it probably has nothing to do with it.

However, the TDI doesn't have either of those parts, so it's likely a software issue with VAGCOM.
Occasionally, the error codes get mixed up during the "unlocking" process...

Quote:

Can someone help me, or do I need to go to the workshop?

The latter depends on one's manual skills...

hello

I found the problem. A pressure hose has burst, right before the suction nozzle; it's a piece about 20 cm long.
www.quirin.lu/test/1.jpg
www.quirin.lu/test/2.jpg

Thank you for the quick help.

Regards,
Luc.