i have an 03 spec v and its got 87000 on it and after about an hours worth of driving it starts to buck, check engine light starts flashing. after shutting the car off to prevent damage to engine it clears all the codes and the computer when scanned doesnt see or recognize there was a problem. any one have any ideas (the lazy bastards at my dealer dont have a clue and wont even call techline).
in past history it shows the classic p1147 or downstream o2 sensor and the latest would be from about 5 weeks ago (last time for hi-way travel) @ 64mph the car picked up a silent code of p0420.