I have a Model 665.15529 dishwasher and nothing on the top rack gets clean. I have looked inside while it was running and there is no wash water getting to that area. Does anyone have any ideas.

I have Kenmore dishwasher model
665.1602 ,it makes a loud noise just
Started. II looked at sprayer arm in bottom and it is loose and can be taken out ,could this be problem
Thanks Jack