Ok ive had my 92 240sx SE coupe automatic for about 2 months and ive noticed a few problems.the engine is starting to give some and ive noticed an unusual shaking when im stopped at a light its kinda hard to explain but it sounds and feels like the engine is giving out because it will sound real strong and then just fade out sorta like its goin to stall. What could be the problem?
Also ive had to replace numerous oil leaks and the torque converter came loose twice. Should I just get a new one rebuilt or try and rebuild this one.

(its a KA24DE for those wondering whats in it)

 

you can get another ka for less than $500 that runs good. It sounds like a maf issue or you need to change your spark plugs.