mk 4 golf tdi 130 limp mode VNT mechanism etc

[mojo7676]

I've read with interest some of the posts about going into 'limp mode' for whatever reasons. In my case, the car is okay around town and inconsistent at motorway speeds. for example, i drove 35 miles on the motorway and the car was fine. on the way back, it went into limp mode 3 times! i did notice that it's more likely to happen if you accelerate hard, however. the car's in pretty good nick all round and has done vry few miles - though is sadly out of warranty!

under the bonnet, there's no hole in any hoses. however, the VNT mechanism thingy is stuck pretty fast - hardly moves at all with our without the engine running. the mech (not a VW specialist but knowledgeable enough) spent a good hour trying to free it up but had no real joy. he also noticed the throttle lever doesn't move when you press the accelerator and that the level of vacuum appears to decrease when you put your foot down - he took a thin hose off and felt suction, i guess. of course, everything was done while the car was stationary so maybe thing change when the car is in motion (?).

any help, advice, comments, wisecracks and relevant contributions greatly appreciated. tia. mojo.

[Rustynuts]

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the VNT mechanism thingy is stuck pretty fast

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That's the problem. Get that unstuck and it'll work. It takes some doing, and you may need to remove the whole turbo to get at it properly, but don't look for any other problems until you've done this.

[mojo7676]

thanks Rustynuts. will get it on the ramp and get the mech to have another go.