Hi. I wonder if anyone can help please? I have a 2007 Kia Sportage CRDi 1991cc. It's had an intermittant lack of power for a little while. The dash warning light came on to identify an EGR Valve problem. This was replaced with a new one. Now I have found that the car runs lovely whilst the air con is swithed on. Turn the air con off and the car splutters and misses at low speed when trying to accelarate. Switch the air con back on and the problem has gone.....weired! Can anyone help please? Chris.