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Looks like the intercooler has a small leak top right. there's oil seeping out.

Turbo hose needs tightening too. Oil has seeped out onto the turbo. A catch can might help

In my opinion The crd is generally ok at controlling boost right up until you block the egr. After that some will be ok , most go all over the shop.
If it only has a 3” exhaust and nothing else it...