EMMISSION FAIL HELP
#3
You may get better answers on the 993 forum for a 1997 car.
That said, I suspect this car failed due to valve guides that are worn. When this happens, carbon fills the secondary air injection ports (SAI) and trips an emissions-related CEL.
This is not an inexpensive fix and should be factored into the car's purchase price. I'm a bit dated, but you should plan on about $7k - $10k for a top-end rebuild to address the port blockage and the valve guide replacement.
That said, I suspect this car failed due to valve guides that are worn. When this happens, carbon fills the secondary air injection ports (SAI) and trips an emissions-related CEL.
This is not an inexpensive fix and should be factored into the car's purchase price. I'm a bit dated, but you should plan on about $7k - $10k for a top-end rebuild to address the port blockage and the valve guide replacement.