All Things Mk5 > Mk5 General Area

BOOST issues. Any advice gratefully received.

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MS1:
Hello there.

So I started to notice a couple of flat spots, that have gradually become worse and worse. Took my car out and did some live logging with a mate today and it showed the wastegate function was a maximum of 75%, but mostly 40-50% if that.

Diverter valve or wastegate issue?

AJP:
If you're not already on a revision G dv it's worth changing to that anyway.

Then see what your logs say.

Although a dodgy dv usually means a consistent loss of boost over the revs rather than flat spots.

Don't rule out the MAF or N75.

MS1:
I've got a revision G ready to go, as I'm booked in with R-Tech on the 23rd.

Had a new N75 valve replaced only a couple of weeks ago as a matter of course.

I'm having a smoke test tomorrow, so will get MAF sensor checked too.

AJP:
You'll love the map. Their reputation is well justified!

MS1:
I'm buzzing for it mate, they're mapping in a new Loba HPFP too! 

Just a little apprehensive as I've been experiencing the odd boost issue of late and it's gotten a whole lot worse these last two or three days. I'm desperate to get it sorted, as I don't want it be turned away from R-Tech, especially as it's a 500 mile plus round trip.

I've had so much work done recently. Cambelt kit, water pump, thermostat. Clutch and dmf. N75 valve. New R8 Coilpacks and NGK Iridium BKR7EIX. New ITG Maxogen G60 CAI. Forge throttle body hose. I'm guessing the problem/leak could be coming from anywhere. Fingers crossed, a smoke test brings something up because I'm getting a little disillusioned having spend £2500 on the old girl and having had nothing but problems since. Prior to than 70,000 trouble free miles, 100% boost all the way haha!

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