I just had this EXACT problem as you described, i have a 98 altima. I took it to the dealership and they replaced a valve that lets air out while your pumping. It was going to cost 320 but i know a guy so it was 240. The parts is apparently $125 now that you know the problem save the 100 bucks on the diagnosis(computer code is 215 i think and it is called a vent control valve i think)!!! I'm 99% sure it is the problem. It is common and dealerships know exactly what it is
You can check out my thread, its called 'GAS won't go down, vent problem? HELP'
If you want to know more just ask
2003 Nissan Maxima, Dark Grey, Nissan SE-R Rims
Last edited by Altimafox; 08-31-2004 at 04:49 AM.