Wierd Fuel Problem

[Cooper]

My GTR is currently running rough, with hunting idle and coughing and spluttering. I have replaced the fuel pump and spark plugs. Spark plugs were a temporary fix

I took i to my mechanic who cleaned and checked the AFM's and played with the fuel pressure. This fixed my car for about 130km and now the problem has come back.

Does anyone know what could be the problem? Could it be solved with an adjustable fuel pressure regulator?

Cheers

[axe s]

Have you cleaned your AAC valve (their is a TUT on here if you don't know how...)

[Cooper]

I forgot to mention that if i run the Air Conditioner there car comes good again and doesnt splutter. The tiny little extra bit off load on the engine helps the problem.