If we run our EFI too low in fuel it starts to miss and loose power. flipping the fuel valve to other tank fast on our non EFI keeps you going but on the EFI and never recovers, still runs like on one cyl. and may do so for ever. what i found is the pick up line in the tank becomes fully pressurized and the small check ball in the pickup screen is forced down closing of 99% of incoming fuel. only fix i know of is to force my hand down into the tank leaving flesh behind for raw fuel to sooth and pulling pickup screen of line watching not to get a eye full of pressurized fuel. once the pressure is relieved, reinstall pick up screen and cycle key a few times to build correct fuel pressure back up (find a bandaid) and your on you way again!!! have others had this problem and is there a fix?