Join Date: May 2009
Location: Denver Metro
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Wastegate operation clarification please
Ok I am finding conflicting information can someone confirm if this is correct?
1. The wastegate is held closed by a spring.
2. To limit boost the vacuum is applied helping override the spring and allowing the exhaust to bypass the turbine blades.
The vacuum is the main source of control but the spring is a fail safe, correct?
If my understanding is correct and I have low boost could a weak spring be the issue? 10PSI is the max I have ever seen with the vacuum line hooked up and can get 17-18 with the vacuum disconnected.
I could see a weak spring allowing the vacuum motor to over compensate.
Is this possible or am I off in left field?
2000, F-350, Crew, DRW, 6 Sp, 4X4, 7.3, DIY Intake, 4in Turbo back Magnaflow Exhaust
Last edited by Mudbug63; 08-06-2009 at 07:41 AM.