When the turbo kicks in at about 3000rpm it will then lose power and wont go anywhere

Its possible.

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Hello everyone having similar sort of issues , any help would be much appreciated ,, trouble with my 04 plate a3 2.0 tdi , the car loses power in first and second makes a lot of noise but doesn't really go anywhere but if ease completely off and back on again the turbo kicks in properly it also won't go over 4000 rpm unless I go off and on the throttle any help would be greatly appreciated also I took the vacuum resivour pipe off whilst checking a few things and it cured it until I was cruising down the motorway and it just lost all power so I stopped and put vacuum resivour pipe back on and after about 15 mins the vacuum must have built back up again because it was back to just being useless in 1st and 2nd gear ..???????? Help !!!! I'm lost

sounds like one of the turbo lines has come off that would explane both the loss of power and sound

You have to check the power switch. And the wires connected to the to it.and check up to the battery connection .The kick does not work if the solenoid , the ignition circuits and spark plug is nut functioning try to check or replace them if destroyed already.

Temperature sensors check to make sure it is warmed up before allowing system to work properly. This keeps the motor from being worked too hard before is has reached temperature. Remember that aluminum has to be at proper temperature and expansion to make all parts work properly.Hope this helps and have a great day.

I don't wish to worry you but I think the turbo kicks in at around 2500rpm and it sounds like it isn't doing so, hence the management light coming on. It could be that failing. Be careful here, apparently the turbo uses the engine oil to maintain its operating temperature and if the turbo seals fail in anyway it eats the engine oil, with the resulting total failure of the power unit. So if you do nothing else, keep an eye on the engine oil level. (You may also notice oil smoke out the exhaust as well).
Unfortunately it looks like a trip to the dealer for them to check what the engine management is saying.

Hi,
This is the second Vw I have responded to in a fortnight.
Your lack of power I presume always happens when the glow plug light illuminates?
This is because it is causing over combustion to vaporised diesel, I would be looking in the Glow plug timer and relay, as for Turbo lag, I run a E34 6 cyl Bmw Diesel and the Turbo only kicks in around 2,500ish so maybe yours is a little tired or in need of a check up?
Hope this helped,
Paul 'W'
Onyer~EDson(:0) {#><U.K.
Please remember to rate my effort!

Have you guys checked your air filters? If it is indeed a bad turbo you can go to www.alldatadiy.com and buy a subscription for your vehicle that will give you the procedures to remove the turbo.It cost less than 20.00 and its good for 1 year and well worth the money. I think if you are slightly mechanically inclined you can do it yourself. Good luck and I'm here if you need me. Thanks for using Fix Ya.

turbo must have a problem or remember tro vehicles have turbo lag. . . usually mitsu's turbos start giving power around 2500prm - 3000rpm. .

but usually on older turbo diesel mitsus the turbos are the first to go. . . .

Cold air is more dense, so that makes perfect sense. Also, a turbo compresses the air, which heats it up, so you lose some of the power gains, which is why intercoolers are so common.