Nah a little bit of dirt isnt going to cause a turbo to spike 5psi.

Id be looking for an air leak somewhere or a loose line off the turbo etc. Like I said if you had a boost controller check the lines on that too.

And its good to know it has a boost cut, helps. But if its been tuned for 18 and your hitting 23, you cant be sure the tune will be safe for your motor at that boost.

Probably a good idea to treat it as an urgent matter.

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