Nissan Technical Advisor 10/15/2010Did you check your battery condition as well as its cables if properly fits and free from corrosions? This problem may also because of low fuel pump pressure delivery or the fuel pressure regulator is failing. A vacuum leak is also a possible reason of this. Moreover, consider also temperature sensor and EGR valve are faulty. Check these and verify through a scan tool. There are parts shops that offer free computer scanning to retrieve the trouble codes.