Likely an intake leak. You can have someone operate the throttle while looking for any leaks which would be easier if that area was cleaned first. A shop can use air or smoke with special adaptors to check the CAC and all piping for any leaks. The smoke or air comes out anywhere there is a leak in the intake system. Air or smoke goes in the intake piping after disconnecting it from the turbo.
Soot around intake???
Discussion in 'Trucks [ Eighteen Wheelers ]' started by wr2001, Jun 23, 2023.
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