Author Topic: Mk5 Golf GT supercharger issue  (Read 304 times)

0 Members and 1 Guest are viewing this topic.

Offline nesT

  • *
  • *
  • Posts: 184
Mk5 Golf GT supercharger issue
« on: February 14, 2018, 04:32:00 pm »
Long story short:

- PCV and DV replaced (the former twice). Gazley both occasions. They didn't manage to figure it out because the Mrs had to move from WG-AKL.
- Drove WG-AKL, noticed supercharger was push-pulling every 1-2 seconds i.e. boost gauge goes up and down and the car just surges back and forth... until the turbo kicks in post 3500rpm

I'm no expert but have read about s/c clutch or belt problems. But just wanted 2nd opinion before taking it to the shops and waste more money again...

Offline GLIDN

  • ##
  • **
  • Posts: 4654
Re: Mk5 Golf GT supercharger issue
« Reply #1 on: February 14, 2018, 05:24:31 pm »
That issues has been caused from a few issues.

1. First one would be people running 95 Octane or below in these engines.

Performing logging on this car, could advise you if you are actually making boost or if the car is trying to protect it self by pulling the power.
The MED17 ECU in these are extremely smart and also provide a whole host of information that requires assessment to be able to make a proper analysis.

Top Secret Project
MK3 GTI 16v Tornado Red - under the knife soon
Mk3 12v VR6 Variant
MK5 GTI DSG - Unitronic Stage 1 | Stage 1 DSG | Unitronic Intake |Tuned by HSP Tuning |
MK6 GTI DSG -  Unitronic Stage 2 | Stage 2 DSG | Tuned by HSP Tuning

Offline nesT

  • *
  • *
  • Posts: 184
Re: Mk5 Golf GT supercharger issue
« Reply #2 on: February 16, 2018, 11:58:28 pm »
Been always topped up with 95+ so I’m assuming that might not be the case with fuel issue.

Will look at the invoice details and let you know what they’ve logged.