Stage 1(ish) boost not meeting requested ideas?

[Gin+]

I couldn't find any glaring leaks with my air compressor rig but that graph seems pretty obvious there's an issue. I was thinking about replacing the DV considering it's probably original but if someone has an opinion I'd be happy to hear it.

Thanks gents!

[MurkyRivers_A4]

BOOST LEAK TEST!!!!l!!!

[Mr.Avant]

I had a small leak at the Suction jet pump that would only open around 15psi. What did you pressurize too?

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[f1torrents]

Obvious boost leak.

[Gin+]

What are your thoughts on it being the DV not holding? Are they known for this type of behavior when they get old?

I pressurized around 18 or so according to my regulator. I too found a tiny leak around the suction jet pump that a hose clamp took care of. For good measure I'm replacing the whole breather assembly with the pump, valves, and hoses although I don't think that's my culprit. I'm fairly new to chasing boost leaks on the 1.8t.

[MurkyRivers_A4]

If its not a 710N, which is the latest and greatest OEM DV, then yes it will leak with anything higher than stock boost.

[agentsmith988]

If it's the original K03 you could have a weak wastegate. Clamp the hose going to the WG from the N75 and CAREFULLY get into boost. It can spike pretty aggressively.

This is a quick and easy test if you're not finding any leaks. At 150k miles, my K03 was only able to get to 17-18 psi when clamped.

[Human Garbage]

If it's the original K03 you could have a weak wastegate. Clamp the hose going to the WG from the N75 and CAREFULLY get into boost. It can spike pretty aggressively.

This is a quick and easy test if you're not finding any leaks. At 150k miles, my K03 was only able to get to 17-18 psi when clamped.

^ What Agentsmith says. I had to put an external spring on to hold boost north of 15psi. Worth giving your actuator a wiggle for play at least.