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Nope - no black smoke and no significant boost.
Great thought on the hose. In the process of adding the boost gauge to troubleshoot the lack of power problem, I replaced the MAP hose - so I actually eliminated that potential problem source by accident (the old one was hard and getting brittle so I decided it needed a replacement). I know the new one is on there tight and I have hose clamps keeping it there. When I put low pressure compressed air in to test my gauges, I went through the MAP hose as well.
I am thinking my exhaust may be partially clogged (cat?) and/or my turbo has seen the last of its days. Either way, it's looking expensive and not a quick fix. Someone also suggested I look at the seal between the turbo and the Y-manifold - I'll have a look at that next.
F250HD 1997 4x4 PS-Diesel Crewcab, MT,
Ron's 1.00 turbo, EBPV-delete, BD downpipe, felineless, Baby Swamps, TS Performance chip, pillar pod/pyro-boost-temp, 185k miles.