Well, have been through the wringer on this one. After checking every wire in the system and confirming all the connections were good the lift would no longer start. Found we were not getting a signal from the ECU to the relay for fuel solenoid. We replaced the ECU thinking this would take care of all the problems. We now show a code of E-21, mass air flow sensor. We tried swapping with a known good running lift with no change. When replacing the ECU is there anything that must be calibrated or loaded to ensure the lift is running properly? Thanks for any help.