Thread: 98 yukon 5.7l ping and P0171/P0174 codes
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Old 06-10-2010, 07:31 PM
maxwedge maxwedge is offline
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Re: 98 yukon 5.7l ping and P0171/P0174 codes
Low fuel pressure, vacuum leaks, bad o2 sensors, air getting in behind the maf, are all possibilites for a lean condition. I'd check fuel pressure first, you need 6065 psi at the port.
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