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It sounds like the fuel pressure regulator diaphragm is broken, causing fuel to flood the engine when first started, then clear up and run fine.This is a common problem. let the vehicle sit for a few hours , then pulling off the vacuum hose to the regulator. Fuel may dribble out of the hose indicating bad regulator.You can also smell the end of the hose for a raw gas smell.
Check fuel pressure regulator.
Pull out vacuum line from regulator and see if there any gasolin inside . If there is , it's your problem. Broken diaphragm inside fuel pressure regulator.
Replace fuel pressure regulator.
If not , further diagnostics has to be performed by workshop.
From your codes it sounds like your problem is in the fuel system. P0171 is air-fuel ratio is lean, malfunction. P0192 and P0194 is low pressure detected in fuel rail. So you need to look for leak/s, fuel pressure, fuel regulator, and fuel filter. good luck.
The fuel pressure regulator is located in the fuel rail, held in by a torx screw.
Release pressure from the system by cranking the car with the fuel pump fuse out, or byt depressing the relief valve on the end of the fuel rail.
Unbolt the regulator/housing assembly, unhook the vacuum hose, and remove the regulator/housing assembly.
Installation is reverse order.
If you need to replace the regulator that is located in the fuel pump, it is not serviceable. Luckily they rarely fail.
At the end of the fuel rail, attached to the front of the engine, is the FUEL PRESSURE REGULATOR. check to make sure that the vacuum hose attached to it is TIGHT. If this regulator is not functioning---replace it.
You may have to do a fuel pressure test to ascertain the correct pump pressure and function of your high pressure undercarriage pump. At lower than OEM pressure, the injectors will not open, even with fuel flowing through the rail.