I have a 00 toyota corolla with p0171.1. I ckecked short long fuel trim and they were high. Found no vacuum leaks so I installed a maf9 (i have tried 4 sensors from different stores thinking I may have got a bad part). Still no fix and then I replaced a 02sensor and no fix.I cleared codes each time and reset pcm but code keeps apearing p0171. Also when taking off from a stop there is a really bad hesitation. So bad if fact it is dangerous to drive with possibility of someone hitting the car. Any help would be great. I also checked injectors even tried new ones and also fuel pump.