Hesitating Boost help

[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.

[muff1991]

so your boost is sorted now?

[GTiBlues]

Thursday I'm getting it fitted. It held up today playing against a mk7 gti. My car pulled away quite easily   from him

Can't go past 80mph as the car shakes itself violently. I'm certain its a cv joint thats gone. Just can't locate from doing the basic tests.

[muff1991]

let us know how you get on Thursday 

[GTiBlues]

Got my valve changed last night along with my cam follower, also yesterday I manage to fit my red top coil packs with NGK IRIDIUM IX spark plugs BKR7EIX. Over all the idle is so much smoother, the characteristics through the rev range was nicer. Then got the valve changed later in the evening and to our discovery...it was in pieces. it feel apart when we took it out. The cam follower wasn't too bad to be honest, no history of it being changed. I'll get a picture of it later.

Now in neutral you can hear spool up when you rev it, didn't do that before. Noise factor through the exhaust is throaty boost. Spool up now even lower in the rev range. Felt weird pulling away from traffic lights with extra power. It must of been last year when the Rev D was failing.

Here's a picture I took last night once I picked up the parts from off the floor.

[GTiBlues]

[muff1991]

wow, so she's all sorted... that's good news

ill be checking mine soon, I haven't checked it for 10 months so might be worth me checking.

personally I would of said that cam follower is borderline bad so good job you changed It anyway, I bet she's like an animal again 

[GTiBlues]

It goes well now when I want it too.

Got a new issue now, front shocks are leaking.  Got a quote for new shocks, £58 each from TPS. Will pick them once my TTRS top mounts arrive.

[muff1991]

I prefer this shock set up to the mk4, easier to change the shocks / top mounts etc...

[GTiBlues]

Also, on the mk4 platform you get aftermarket polybush top mounts. You don't on ours sadly.