Mechanics

BAD HESITATION AND P0171

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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Shawncoleman
September 20, 2012.




Did you test the fuel pressure and engine compression?
Have you checked the valve clearances?

KHLow2008
Sep 20, 2012.
Yeah I checked fuel pressure and it was reading within spec and compression was between 175-190
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Tiny
Shawncoleman
Sep 20, 2012.
Ok, check the valve clearances and TPS.

KHLow2008
Sep 20, 2012.

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