Help, boost problems

[qwerty123]

Hi guys
I recently installed a boost gauge, at idle, I'm reading 20 vacuum. I think I'm not getting any boost? The gauge won't go past 0, the needle only stays in vacuum. When the cars moving, it reads max 10 in HG max. What should I be looking for to fix this? Thanks

[AudiA4Turbo22]

when u drive and hit the gas does the guage go past 0?

[qwerty123]

nope

[qwerty123]

help?

[B6Lovin]

wait, do you ever even hit 0? (sorry, it's kind of confusing to read)

if you're not ever even hitting zero then you probably installed your gauge incorrectly or have a loose connection/hole somewhere in the line

[dubenvy]

weird....my car started doing the same thing today. If you reset the ECU, the boost comes back but disappears after about 100 yards.

N75 about to go?

(i've been searching for the last hour trying to find an answer....but this is identical to what i have)

NO flashing CEL
NO Flashing ESP light
Recently had my brakes done.

[dubenvy]

weird....now it almost seems like when i hit the brakes for the first time, it takes the boost away. When i start the car, i can boost all the way up to the first time i have to hit the brakes.

[Carlitos]

what does the flashing ESP light means?

[absolutegtr]

Does the car itself feel like it has no power? Can you feel boost kick in? (This is would obviously indicate a bad gauge)

If the car is super slow then I would lean towards the N75 valve

[dubenvy]

The car has power and then when i get to the stoplight at the end of my driveway, it disappears. Then i can't get it past 5psi.

[dubenvy]

thoughts?

[A4 Moda]

1. Check for a boost leak. Do you hear your car venting boost when you accelerate? If so, it's a boost leak.
2. Most likely it's your N75. Get another one, or get an MBC to test. If you get boost, keep the MBC. Make sure your N75 is plugged into both the TIP as well as the wire harness. The only lines that need to be removed are Turbo signal and wastegate signal route to the MBC.

[dubenvy]

Pretty sure it's the N75 now. i didn't have boost for the first 10 minutes this morning and then when i got to the highway, it's came back.