Standard boost pressures? Power delivery / turbo issue

[mrred32]

Hi guys, having a little issue with power delivery/accelaration in the GTI (DSG) and wondered if someone could advise.

When cruising everything appears fine however when I boot it the Rev needle begins to rise, then skips and appears to drop (not changing gear). It also happened when in manual and I go down to 3rd - 1200 revs and then boot it. Also there is a noticeable lack of power (accelaration and power delivery feels similar to my old N/A clio)

Thinking maybe turbo related but as my first turbo charged car not really sure what to look for. Tried checking the general area for oil/leaks and can't really hear a whistling noise (tell tell sign of pressure leak I think?).

When hooking up to torque on my phone using obd I find when cruising at 40 in 5th the boost gauge is between 19-27 in/Hg (negative) and when booting it it rises to 17psi and drops very suddenly. Is this normal? I've seen on another forum that it should generally be peaking at 12psi. I'm getting a bit nit picky with issues now as Ive only 1 month left on my manufacturers warranty lol. Cheers in advance.

[mrred32]

Any thoughts? Looks like I'll have to suck it up and pay for the diagnostic at VW

[PD_GTI_MK6]

Any thoughts? Looks like I'll have to suck it up and pay for the diagnostic at VW

Sorry I've not idea about this but couldn't you take it to a non-dealer to run diag ?

At least that might be cheaper.

[Rhyso]

Any thoughts? Looks like I'll have to suck it up and pay for the diagnostic at VW

Sorry I've not idea about this but couldn't you take it to a non-dealer to run diag ?

At least that might be cheaper.

If its still under warranty then you shouldn't have to pay for the diagnostic if the problem is indeed covered under warranty

[mrred32]

Really? I have like 1 month warranty left but I thought that regardless of whether the component is covered under warranty the standard diagnostic (in this case £99 iirc) would be chargeable

[eug2huge]

Not really mechanical person but have just upgraded my diverter valve as my car has been re-mapped and it was recommended.

The standard part is ok but apparently it can fail quite easily. Might be worth checking.

[Rhyso]

Really? I have like 1 month warranty left but I thought that regardless of whether the component is covered under warranty the standard diagnostic (in this case £99 iirc) would be chargeable

I've never paid for a dignostic for a warranty issue

Why not ask the question??? Worse case you are £99 worse off BUT you could have work done which costs hundreds so in effect saving you money. Especially if it goes pop soon after your warranty expires.........

 

[mrred32]

Got it booked in, thanks for the advice. £99 for potentially a lot of work seems pretty worth it.

Mmm I've heard about issues with the diverter valve, I might look into the symptoms of a failed valve as it might be what I am experiencing. Cheers.

[chris1h]

if you had 1 month left on warrenty you shouldnt be paying a penny for them to be looking at it i wouldnt have thought. I certainly wouldnt be paying a penny!  Should took the car in explained the problem. Said dont give s*** what you need doing diagnostics etc its under warranty you sort it, theres the keys. Dealers are a joke!

[mrred32]

I did exactly that! Went into VW, they refitted the air intake hoses, checked with diagnostic, recharged the Aircon and got it back to me with no charge .

I'm pretty chuffed with that, a clean bill of health now ready for my MOT and service next month. Just need to start looking at the extended warranty costs now. Cheers for the advice guys.