Thread: Loud knock after vacuum hose change
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Old 11-11-2004, 07:36 PM
Jed Rule Jed Rule is offline
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Re: Loud knock after vacuum hose change
The EGR system is used to lower the NOx emissions. By diluting the air/fuel mixture combustion temps are reduced. The egr valve is activated when the engine is in closed loop and above idle speed.
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