Two things which pop into mind quickly reading this thread:
1. Does the ETM / electronic throttle need to be re-set / reprogrammed by Volvo if 'main' parts have been replaced? - I don't know the details of replacements, however I have recently had an ETM TPS #2 failure, which prevented the car from running properly at idle, and if driven it was very lumpy and gutless? - I managed to reset the codes using Vida (with the car running) and drove the car (with reasonable performance, but ETM and ECU lights on) for nearly two weeks whilst waiting for my contactless TPS to arrive? - When I fitted the new TPS to the original ETM, all faults cleared and the running is top notch, but it was my understanding that if you replaced either the ETM or the Throttle pedal then it required a trip to the dealer?
2. Have you checked the recirculating 'dump-valve' Diaphragm on the turbo to make sure it hasn't ruptured? - this can be checked doing a low pressure (4 or 5 psi) check down the vacuum line to the valve - if it doesn't hold you'll need to romove the valve and check the diaphragm. Mine went with a 'pop' about 5 years ago and at the time the replacement from Volvo was about £125 just for a bit of rubber!
Good luck.
Ade
Bookmarks