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best way to check your egr is to have someone get in the car with the engine running and have them rev the motor quickly and have someone else check if the EGR diaphram moves at all. My friend here is San Diego told me thats a way to fix it if there is no vacuum. Hes gunna show me what he did exactly this next thrusday. He told me that you run a vacuum line from the intake near the throttle body somewhere then run it to the EGR assist assembly.
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