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Um, WHY was there oil in the intercooler? It doesnt hold oil, so you need to address THAT first.

Went out, got a full tank of premium fuel and added a DPF cleaning additive
UM.... WTF??? Diesel doesnt come in octane grades...
 

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No, if you have oil in your IC, then you need to address that first... what part of "it doesnt hold oil" is hard to understand? No, vacuum cannot suck oil out of the turbo... a cracked IC doesnt increase the vacuum the engine can pull.
 

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There should be no vacuum in the induction system after the turbo but a positive pressure.
Negative. At idle and decel there is only vacuum.
 

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Talon, at idle there is still exhaust gas passing through the small tbb and thus developing a pressure.
Do you understand what my name represents? I know a shit ton about turbos and those motors, there is no such thing as a non-vacuum ICE. Why must you ALWAYS argue with me and try to prove me wrong?
 

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Listen here redcoat... at idle and decel the turbo DOES NOT PRODUCE enough boost to overcome the vacuum. Hook a real boost/vac gauge up to the intake mani and read that and youll have to come back and admit youre wrong.
 
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