[bananas]

For what it's worth, I had this same issue when at high boost (25-30psi). I've narrowed my problem down to an air pocket or bubble. Fully repriming the pump seems to have solved the problem. If I let my meth level get too low, the problem reoccurs.

I also had this symptom when the fittings prior to the pump were not fully tightened; during a test I could see air bubbles entering the nylon hose at the loose fitting.

Now the flow meter seems to show approximately the same number of bars when I'm between 60%IDC and 90%IDC.