I recently got my late brother's 97 Land Cruiser with 288k miles which he bought new. I've driven it on a couple 100+ mile trips and around town; it drives great and engine idles smoothly and is very responsive. I had one disconcerting experience; while coasting up to an intersection at 15-20 mph the engine died. Luckly there was an empty parking lot I could pull into with much steering effort ; I think it took me over a hundred feet to stop with no power brakes. Any suggestions on what I might check? I've been a shade tree mechanic for 50 years. Thanks much.