MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: Raeez mk5 on September 12, 2020, 10:38:50 pm

Title: Mk5 gti boost pressure way down. No boost leaks.
Post by: Raeez mk5 on September 12, 2020, 10:38:50 pm

Hi guys

I have a problem with my car not reaching requested boost pressure of 2530mbar but only spikes to 2240 on initial throttle and then immediately drops to 1900mbar. Car is stage 2 with hpfp upgrade, intercooler, induction, full exhaust.

Car has new aluminum boost pipes and no boost leaks.

Turbo is basically new, a few months old.

Wastegate was tightened more but made no difference.

Actuator holds pressure.

Tried 3 new n75s no difference either.

I have a log in 3rd gear log of the boost and n75 with throttle position and rail pressure but do not know how to attach it.

Title: Re: Mk5 gti boost pressure way down. No boost leaks.
Post by: mjmallia on September 14, 2020, 10:40:15 am

Checked the DV for splits?