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Reload this Page '02 f150 "lean" condition p0171 p0174

Ford F - Series The Ford F-Series lineup offers a plethora of models for every occasion or occupation, starting below $20,000 and climbing beyond double that. The F-Series line offers something on the order of 75 permutations, more than some car companies' entire lineups. All are capable of work or play, even those models with luxurious interiors, and all have four doors.

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Old 07-24-2008, 12:44 PM   #1 (permalink)
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Default '02 f150 "lean" condition p0171 p0174
Hello all, I have an ongoing issue with the infamous p0174 & p0171 code coming up on my OBD. I have replaced the Mass Airflow Sensor, both Oxygen sensors, and have checked the manifold for any intake leaks. This is occuring on the 4.2 V6. Does anyone have a suggestion were to go from here? This ones got me stumped. Thank you all in advance!
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Old 07-24-2008, 01:59 PM   #2 (permalink)
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Most of the time it is the upper intake o-ring gaskets.
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Old 07-26-2008, 08:40 AM   #3 (permalink)
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I just had the same thing ...the hard plastic vacuum line was cracked.
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