Quick question:
when I'm doing the test on the meth kit, with the check valve inline and the nozzle connected, the pump turns on and everything but it sounds like its pulsing rather than becoming progressive. The led stays solid green so I know there's no error. When I take the hose out of the nozzle (still going through the check valve) it starts slow and progressively builds up to hard.
Is it suppose to behave like that going through the nozzle?

 

never mind I called AEM and they said it was normal behavior. He said that because of the restriction the nozzle presents in the flow, and the fact that the pump works on a pulse width signal and not a constant signal, it pulses. Which is in contrast as to what the manual says...that it will start slow and progressively build to a "steady flow."