flash7210 wrote:
Pardon me for not reading every post in this thread...
You've determined that its not a fuel system problem, correct?
At this point, there are no apparent leaks. I'm not ruling out air in the fuel completely, but I'm also not seeing it as necessarily being the cause.
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And you now think its a low turbo boost problem?
Maybe. Low transmission pressure may also have been partially at play, at least as far as some of the performance issues went; see my reply above.
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Have you checked the MAP sensor?
Yes. Pre-emptively cleaned it and put it back in service. No reason to believe that it has failed at this time, though it is possible that it may be in a limbo state that isn't throwing a code.
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Do you have a way of reading actual boost from the turbo?
Yes, via OBD-II. Will check again when time permits.
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What codes are you getting?
None, and no codes were stored as of the last check two days ago.
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If you really want to test the turbo itself, connect a vacuum line directly from outlet port of the vacuum reservoir to the vacuum actuator on the turbo.
This will bypass both solenoids and set the turbo to FULL boost.
Then take it for a drive.
You shouldn't get too far before a overboost code is set and the engine goes into limp mode.
If it doesn't go into limp mode, then there is definitely a problem.
I've done the bypass check WWDiesel outlined above. There was no change in soot or performance, and no codes thrown. Is this the same bypass you're referencing?