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Old 12-01-2010, 12:44 PM   #4
dartmouthrocks
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Re: 2002 Avalanche -- Code 171 (Bank 1 Lean)

Thanks for your response. Checked out an Actron pressure guage setup from AutoZone--

Checked fuel pressure at port and it topped off at about 12 psi. Must be the fuel pump unless someone has experience with a pressure regulator causing such a drop?

Mike
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