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George H.
George H., Hyundai Technician
Category: Hyundai
Satisfied Customers: 2102
Experience:  Hyundai Gold certified, ASE Master tech 15+ years
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2005 Hyundai Tucson 2.7 code problems po 174 after driving a

Customer Question

2005 Hyundai Tucson 2.7 code problems po 174 after driving a little bit longer po 171
lean codes, car was repaired a month ago po 300 po 306 po313 po 130 and po134
1 coil was replaced and one oxygen sensor b1s1 ..............
Submitted: 1 year ago.
Category: Hyundai
Expert:  Andrew Martin replied 1 year ago.

So the lower intake gasket was replaced along will all the other things you listed?

Customer: replied 1 year ago.
Sorry about the late return : Andrew , but the customer picked the car up cause he needed it , we are a little puzzled way
171 will not go away , idle fuel trim ok mid range no good ,, top end hard on the throttle ok ? fuel good pressure and volume ok
4 oxygen sensors, check the cats back pressure 1.5 2.0 front and rears . full back pressure 5.lbs hard om the throttle ?
carbon cleaned helped most 3.0 hrs on the machine . pinched off booster purge and most any thing connected to the intake ,inc lower intake gaskets, upper gaskets , and a cardone mass air flow sensor reman ?