850 T-5R problem after problem, losing faith rapidly

[aquila2003]

Thnx again for the replies, really helpfull. Just did the glove test, check the video below. It seems that PCV system is clearly blocked. I will attend to this hopefully next weekend.

Took it for a drive through the city till the engine was at good operating temperature, drove it some more. hit the throttle good. And now all of the sudden it runs great again. Cant figure this out!

[aquila2003]

ah! I was almost affraid my Volvo would fail at failing. But i took it for another drive just jet and now is runs bad like before. I've made a short video, you cant hear much but you can check the RPM and turbo gauges, they show exactly what it keeps doing.



It stalled this time. Mostly it bareley manages to keep running. With a little throttle it picks up immediatly.

[Jaguar xjs]

I'd second what the others have mentioned and I think I'd start by checking and cleaning all possible grounds ensuring good contact. Then do the same to the hot leads. Revving the engine and then dying. Perhaps during the rev some contact is being lost resulting in the stall. Bad contacts both negative and positive can wreck havoc on trouble shooting.

Gordon