[Mk2] [Turbo] No boost!!

[Major combover]

Last Friday I revved the car hard in second gear and suddenly I lost all boost. Yesterday I checked all vaccum hoses, none had come loose or split. Then I revved the car and on let off i heard a little pshhh coming from the actuator... Could the actuator maybe be stuck open?

[shinny]

If you literally have no boost then I'd be looking at the intercooler pipes (you know, the big ones!) not tiny little vac hoses. Easily the most common thing in this situation is n intercooler pipe having popped off.

Then I revved the car and on let off i heard a little pshhh coming from the actuator... Could the actuator maybe be stuck open?

The pshhh you'll have heard is probably the blow off valve. An actuator stuck open isn't impossible, but it's unlikely IMHO... and I'm not sure how you could say the noise came from the actuator. They don't tend to make any noises.

[Ryan S]

If you literally have no boost then I'd be looking at the intercooler pipes (you know, the big ones!) not tiny little vac hoses. Easily the most common thing in this situation is n intercooler pipe having popped off.

Then I revved the car and on let off i heard a little pshhh coming from the actuator... Could the actuator maybe be stuck open?

The pshhh you'll have heard is probably the blow off valve. An actuator stuck open isn't impossible, but it's unlikely IMHO... and I'm not sure how you could say the noise came from the actuator. They don't tend to make any noises.

Sounds exactly like a boost hose has popped off or split.

[Major combover]

Oh so might be an even easier solution! I will check the intercooler hoses tonight. What else might cause it from not boosting?

[Turbo tibble]

I have had a similar problem a few times, mine was indeed the gate stuck open. That was due to a cheap (but shiny) ebay decat. You should be able to hear a boost leak if it's not the waste gate.