K4-L1 Wees don't really have an FI light. If a fault exists, the clock display changes to an FI in user mode. In dealer mode, a no fault condition is -C00. If there is a fault, the fault code is shown, C44 in this case. The dash before the C is a TPS calibration tool. It should be centrally located at idle and raise to the top at cruising speed. 2500-3000rpm seems to be optimal for the raise point but things are okay as long as the dash is centered at idle. If checking, be aware there is about a half second delay before the dash responds so the throttle needs to be held for a second at each increment in rpm rise.