i have an a4 2006 2.0t 125000 miles automatic. every time i try to drive it it starts ok but slowly it starts to miss, then miss more and more till it will no longer run. i pull the spark plugs and they are all 4 fould.
before this happened i had the valve cover off and when i put it back on this would happen. never had it happen before.
as for codes , i get misfire codes and p000a witch i cant find , 2293 fuel regulate, but my car doesnt have a fuel regulate, and p507
please any help would be wonderful. im stuck

 

Check the connector on the camshaft sensor? P000a is a camshaft sensor error. Perhaps you disturbed it taking the valve cover off. Also check the electrical and vacuum connections around the top of the head for cracked lines. The 2239 code is an O2 sensor code. However, your car does indeed have a fuel pressure regulator. All injected engines do.

 

i put in a new camshaft position sensor. and that code is 2293 not 2239, and according to audi 2005 was the last year they used a fuel regulator. if it has one where will it be.

 

Fuel Pressure Regulators will be on the fuel rail. The return line to the tank will be coming out of it. However, looking at the part, it does appear that it isn't your normal regulator with a vacuum line attached. It's an inline unit in the fuel rail. It's the top on listed below.

06 2006 Audi A4 Quattro Fuel Pressure Regulator - Fuel Injection - Beck Arnley, Genuine, Standard Motor Products - PartsGeek

I'd still check the wiring connection on the cam sensor.