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Discussion Starter #1
I can't figure this out. 1992 300D 2.5. VERY well maintained. Drive the car, after every first start, and it boosts normally the first time. Subsequently it won't boost more than a few psi. Recently removed the high end stereo equipment and returned it to stock?

Things I checked:

Replaced fuel filters
blew out fuel line to tank
removed, checked and cleaned tank vent
checked lift pump, ok.
checked vacuum lines but didn't see anything unusual
turbo ok

It seems it's either fuel or the ECU isn't controlling the turbo correctly. Or maybe some vacuum issue.

Help!
 
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