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Bad hesitation and P0171

Tiny
SHAWNCOLEMAN
  • MEMBER
  • 2000 TOYOTA COROLLA
  • 150 MILES
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.
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Thursday, September 20th, 2012 AT 8:22 PM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Did you test the fuel pressure and engine compression?
Have you checked the valve clearances?
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Thursday, September 20th, 2012 AT 8:34 PM
Tiny
SHAWNCOLEMAN
  • MEMBER
  • 2 POSTS
Yeah I checked fuel pressure and it was reading within spec and compression was between 175-190
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Thursday, September 20th, 2012 AT 9:26 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Ok, check the valve clearances and TPS.
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Thursday, September 20th, 2012 AT 10:07 PM

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