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Mack cxn 613 throttle cut out


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I have a 2006 cxn with an ac460 throwing codes of extended range boost pressure voltage above normal or shorted to high and  variable geometry turbocharger actuator #1 current below normal or open circuit. When I’m pulling and building up boost the throttle completely cuts out once it builds around 40 psi. Curious if anyone has any ideas or similar problems with a solution 

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https://www.bigmacktrucks.com/topic/76333-mack-cxn-613-throttle-cut-out/
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