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Old 12-01-2010, 01:05 PM   #6
MT-2500
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Re: 2002 Avalanche -- Code 171 (Bank 1 Lean)

Quote:
Originally Posted by dartmouthrocks View Post
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
Where and how did it top off?
Jumper fuel pump and see what pressure goes to and how long it stays there.
Give us the fuel pressure with pump jumped?

Tank low on fuel or fuel filter pluged or fuel pressure regulator or even ground and hot wire to fuel pump can also lower pressure.

I like to plug or block off return line and check plump full pressure.
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