3 weeks ago my Maxima start to shaking during driving and lost the power. The problem is even bigger, when stopping on red lights. I went to Nissan dealer, they did self-test, it shows DTC 1320(primary ignition coil problem). They wanted to change all the six coils, what will cost me about 700 USD. Anyway, there's no any warning light on dashboard, but lights are working normally during ignition. This problem sometimes going off for a short while, and after coming back. There' also a big pressure in fuel tank, when I switch off the engine and I try to open fuel tank cap, can hear very loud sound of pressed air running out of the tank. Please, if anybody know what it can be and I can repair this fault, I will be really thanksfull for adwise.... It' making me crazy...