my toyota innova E diesel 2005 (mileage is 65000km) very gd condition but on the 4th year up to now. On and off, i think of the fuel pump it sometimes occur on the second gear, it will suddenly choke but it will disappear for quite a while then it will again happen.Is this a factory defect? i have heard from other innova owners they also experience this. What do you think ?my car is 5 yrs old is this still under warranty if it is a factory defect.?