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Old 02-10-2004, 04:24 PM
81Wagon 81Wagon is offline
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Join Date: Sep 2003
Location: Santa Barbara, CA
Posts: 471
Quote:
Sounds like a mechanical jammed waste gate
Can't be. That wouldn't stop the boost controller (which comes before the wastegate) from upping the boost past 7.5 psi max. Nor does it explain the fact that somehow I get boost with the wastegate hose completely disconnected.

Quote:
or your gauge is broken
It's a brand new Isspro gauge that was working fine two weeks ago; I suppose it might have broken but that still wouldn't explain how I seem to get boost with the wastegate hose disconnected.

Quote:
Just for grins; check your vacuum supply...
This is interesting. How does the vacuum interact with the boost pressure? Tomorrow I'm going to borrow a mityvac and check a few things (the accuracy of my boost gauge, for one). What should I look for? I've never messed with the vacuum system before.
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'81 300TD Wagon 355k (Miss Diesel)
'83 300SD 180k
'84 500SEL 190k (Parting it out)
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