Moin,

so the culprit was the TBM, changed it to a Bosch Unit (0 280 750 131), adapt it with VIDA and after short warming up, the engine stayed at one RPM in the Range for TÜV.

Thanks for the Help! Good thing i found this place.

Regards - Alex

Another Update, The Volvo that keeps on giving... I wrenched a lot yesterday, wanted to fix the coolant leak behind from the pipe behind the waterpump, nice to know now that the exhaust manifold needs to be removed too, but luckily all bolts came loose and it's not that bad at all. Further i found t...

Sounds logical... The crack is from the internal wastegate (exh-site) to the exhaust. in my understanding ist just "exhaust internal"

I'm chasing a new / refurb Turbo, lets see what i'll find

Finally drove my R on the Autobahn... what a feeling after three month of on/off wrenching.

First thought - bad ground connection

Sounds like the ABS Pump kicks in, its ground or any ground near is in bad condition and pulls voltage down so gauge or else stops working.

After a long search, i got an brand new Turbo.

For better fault chasing i'll keep my other thread updated.

viewtopic.php?p=656438#p656438

How long was the towing distance? I assume it's rear driven and you got it the front axle on the dolly ? Then i think you fried your tranny... Automatics, espacially old ones don't like being turned without the engine running. The engine needs to run to turn the primary pump and lubricate the transm...