My car (2005 Nissan Sentra) had a problem for a while: gas spills out when pumping. I was lazy and did noting about it. After a month or so the car started to fail. At first it was only hiccups but now, the car won't go faster then 5 m/hr and pressing the gas pedal has almost no effect.
I found a forum that said that the Sentra had a known problem with the vent control valve and that it was easy to repair. I removed the part and it was indeed broken. I replaced it, but pressing the gas pedal still has no effect.
Is it possible that the car is in "fail safe" mode and that restarting the ECU could resolve the problem? If so, is it possible to reset the ECU without a scanner?