A valve job is where they turn or resurface the valves in your cylinder head to promote sealing. The head(s) have to come off & they grind the seats as well. The cam opens/closes the valves to...
An air compressor sucks in and compresses air from the atmosphere. Whatever contaminants present in the air at the air intake of the compressor will be present in the air which is discharged from the...
I noticed thet you selected stalling as your problem. The emission code will not cause a car to stall. I think you need to clean the Mass Air Flow sensor and run a cleaner through the air intake.