All Things Mk5 > How to Guides / Troubleshooting

Hesitating Boost help

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GTiBlues:
Problem I've got is the car seems to have good pull of boost. Then next time it feels down on power.

Symptoms I can notice is from the induction kit. The less noise it makes, the better boost the car has through to 6500 rpm. More noise through the induction kit and I feel I get less boost. The revs don't move so quickly too. Also now and then I get chatter on lift off (not very often).

Actions taken so far is VCDS and no faults is coming up. Only new one is the flaps in the heater system.
I've put my PCV back on instead of my delete kit. Still does the same besides a lumpy idle when the revs drop from stopping at traffic lights etc.

I had a Rev D valve fitted new last year, since then I've had a remap and running a tweaked Revo stage 1.

Will this be the result of the Rev D failing? Time to buy Forge or a Rev G?

I can't really hear any boost leaks. Is it worth doing a pressure test?

muff1991:
I sometimes experience a similar thing, you boot it and sometimes it feels the boost is holding back and other time you boot it, you wonder were all the boost come from, I've played around with booting it at different rev ranges and it don't really make a difference, its weird on times.
I've read loads on here that Rev D leak from new and the only DV to go for is Rev G
change that and see how it goes?

SkyJawa:
Had a similar thing - was the DV

TyGTI:
I've felt this too,

Put a GFB DV+ on it and still same issue... Some say the GFB leaks as well, will try a Rev G at some point

GTiBlues:
Just literally this afternoon picked up a Rev G from TPS. I've played around with spool up and full throttle. I'm convinced its the Dv.

You can hear it through the induction kit if its going to play ball or not. On spool up and then gently let off you can hold the boost with a whistle as the piston stays open. Now it hardly does it, just a long pressure release and sometimes chatter.

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