Test Ac: No Start (Alt Fuel Switch Indicator Is On, Then Off): Notes

NOTE: This fault can be mistaken as an auto switch to GAS mode condition. Ensure manual shutoff valves (1/4 turn valves) and manual tank valves (if equipped) are open. If vehicle is equipped with dual LPG tanks, check ALT operation in both LPG positions of ALT fuel switch.

NOTE: On F150 vehicles, there is an excess flow valve at LPG fuel tank. If excess fuel flow valve is engaged it will not allow fuel flow from tank. To reset excess flow valve, close manual tank valve and reopen manual tank valve slowly.