i have had this car a 1984 200sx hatchback for almost 5 years, during that time i have put in the 88 engine and drove it another 2 years.. now it is dead. was running great then slowly it started to stall for a second or 2 then it would smooth out and be fine,, this would happen not too often, but got more frequent as time went on, untill now. it will start and idle til it gets hot and has a steady miss, during it all. after it gets hot it will idle but if i push the gas pedel it dies..... it has all new injectors and a complete tune-up and has voltage to all of the switches and sensors on the engine. i'm lost with it. i been around cars and stuff all my life and i'm not afraid to take anthing apart....... once.. haha. any help anybody has or a link to some ideas would be great and very much apperciated

buy a 86 yr. engine in it 87 and 88 has different improvements in electrical devises computers hooks up.
84,85,86 has 94 % share the same plataform in other words you problem is in coputer/electrical problems