I was thinking (not sure if this is in the comics or not so don't kill me, lol) but if a speedster can take speed, it's not unreasonable that a speedster can give some of his speed whom is amongst the speed force right? Like, couldn't Barry transfer a little of his speed to Jay which could thus jumpstart him again? Basically the principle of jumpstarting a car that has lost battery power.
Also, I'm not sure if Wally West will be the Wally West that we know in the comics as this current Wally doesn't have the speed force yet so I'm curious as how Wally will turn out this season.