A person should have a diagram when they are working on a carburetor of any car. A diagram for the 1987 Toyota Corolla carburetor can be found in the maintenance manual and the repair manual.
The 1987 Toyota Camry does not have a carburetor. It is fuel injected.
Sounds like a bad float or needle and seat assembly. Time for a rebuild.
The PCV valve on a 1987 Toyota Corolla FX16 is located behind the alternator. It is under the intake manifold.
There should be a diagram under the hood driver side for the vacuum hose information and a EGR settings sticker on the passenger side. Find a repair manual or maybe ask at the parts counter at a Toyota Dealer for a view. I have digital photos of my 87 FX stickers if that would help
The 1987 Toyota Corolla came in two door and four door models, a multitude of colors and a 4 speed manual transmission and a 4 cylinder engine.
Motorweek - 1987 2009 Toyota Corolla 27-18 was released on: USA: 4 January 2008
what is the correct torque for a Toyota Corolla engine - 4E-FE, 1st generation engine?
The year and engine size would help me to help you.
Take it back and get them to check it.