jonnny_27 wrote:While driving it. It has no power in 1st/2nd and in 3rd until 2500rpm and the pulls hard after that once the turbo has kicked in.
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It looks like broken vacu VGT turbo control system. Turbocompressor should reach max pressure also below 2.500 rpm, but vanes must be in correct position.
In 2,4 tdci it is hard to look, how works vacu servo on turbo. But after all, when you start engine, servo at once (on idle) should move rod to opposite position. It is good to see under car with good light.
Now quick, easy test - still on idle disconnect vacu pipe from servo port - rod shoudl move out immediately to opposit position. And now connect pipe back - rod must move quickly into servo to the end.
Test by hand is rod stopped in both positions in extreme positions.
If servo works indolently and doesn't go to the extremal positions - that's probable cause of your problems. Test do with cold engine - hands burn! (in 2,0 tdci it is much more easy...)
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Correct diagnosis: - you drive van, and good, conscious diagnostician with IDS laptop on his lap, in real mode, looks for pressure in intake.