94 850 turbo Cyl 5 Misfire

[erikv11]

Sure, there are ways to test the head.

So where are you thinking the problem is in the head, that matches the symptoms here? And would be picked up by a leakdown. I'm just not seeing it. You will recall OP already has good compression numbers.

[IG-88A]

For posterity's sake, or redundancy's, here are warm compression numbers with WOT. 130, 130, 136, 132, 127.

I had the pleasure of speaking to a retired gentleman tonight who works on cars on the side now. He spent thirty years as a tech at a local luxury dealership servicing Benz, Jaguar, Rover, Porsche, etc, no Volvo though. He is a wealth of knowledge, and is 99% convinced that this is nothing more than a vacuum leak leaning the 5 cylinder. He's agreed to help me locate the issue and take it on as a team early next week. I'm looking forward to working with this fella.

As for the European shop that said I needed a new head, I think I'm done with them. Upon deciding to do a proper compression test tonight, I became increasingly suspicious. I have one spark plug cover bolt that's slightly stripped. And lo and behold, its in the exact same hole that I put it in Saturday. One in six chance, I guess. Hmm.

[IG-88A]

An update on an old topic. Sorry for reviving it. I got busy with stuff and forgot to report. It was a torn intake manifold gasket. Just like Volvofan94's. Same place and everything. Problem solved. Thanks for the help everyone. Now to find that 143 problem.

[erikv11]

Thanks for posting. Just seemed no way this was a head problem, good to see that confirmed.