Quote:
Originally Posted by ngarover
Off top of head I forget. I had the whole thing off the car when I did it. Which ever though, it would start to open at 15 and would be fully open at 25
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Quote:
Originally Posted by vstech
I was under the impression that the 87 wastegate is pressure operated... no?
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Yes it is, something doesn't make sense here. You can't test the wastegate actuator with vacuum. It needs positive pressure in order to open. The maximum boost pressure on the OM603 should be no more than 15psi and in most cases around 12psi. The WG should be fully open by 15psi and fuel cut off kicks in at 17psi.