Live 1/2NL game. Hero (SB) has $350, MP1 has about $300. MP1 is very TAG preflop, hasn't played much postflop.

UTG limps, MP1 raises to $17 (large raise for this game, typical raise is around $10). Folds around to Hero in small blind with KQ. No concern of BB or UTG calling. Hero calls.

(This is a mistake. This hand doesn't flop well against the TAG's range.)

Flop: JT3 ($38)

Hero checks, MP1 bets $25. Hero calls.

Turn: 8 ($88)

Hero decides to find out of spades will be good here and opens for $55. MP1 considers before raising to $155. ($298)

Questions: Does villain have A or K? If not, is this a call? I assume no fold equity on the turn, but is the rest of the villain's stack going in on the river even if a four-flush comes out? Is probe betting the turn a good idea here or should I have kept the pot smaller?

wtf. You should never be betting "to find out if spades are good". Like, what does that mean anyway?

give him 100$ and ask him if he has A or K of spades to find out where you are at.

If I check here, I assume he'll bet 2/3 the pot and then I have no idea what he has. I figured if he raises a large amount, he doesn't have the nut spade draw. From the reactions, I guess that was a mistake. What should my action be on the turn?

this doesnt make sense

c/r or c/f the turn

c/f turn