i have a 1992 sc300 with 175,000 miles(i only start it about once a week cuz im 15 and cant drive). it is completely stock.

about 2 months it started missin out and it gradually got worse and worse. now wen i start it it will slowly rev up to idle and then go down to around 200 RPM and when i touch the gas at all it will sputter and die.

i took the heat shield off and then started the car for about 30 seconds and then shut it off and found that the back two cylinders weren't firing. i replaced the spark plugs and wen i did they were covered in oil. even after replacing the spark plugs still didnt improve anything.

 

Your valve cover gaskets are starting to deteriorate. Replace them, replace the spark plug wires, and spark plugs. Clean everything up around the spark valley to insure there isnt any oil residue and reinstall everything. Also insure that your car has the recommended amount of oil, alot of it seeps through the gaskets and distributor cap o-ring.