I have a 2004 sportsman 700 efi. I was riding the other day and it died. After that it acted like it was starving for fuel and couldnt get power to the wheels. Would run up to 2000 rpm and not even budge. I checked the fuel pressure and that was at 40 psi. After that I checked for an air leak to see if it was getting unmetered air past the mass airflow sensor and found nothing. I replaced the mass airflow sensor thinking that would be it. That did not fix my issue. Any other idea on wat to look into