i have a 1998 2500 gmc 4x4 sierra pickup,put in new fuel pump and filter,have 60 psi at pump,only 30 psi at schrader valve, wont start .

Asked by Mar 01, 2016 at 01:04 PM about the 1998 GMC Sierra 2500

Question type: Maintenance & Repair

if i put gas in the intake,it starts and runs till that gas is gone,some one told
me it is the regulator and spider,what tells those two things to start
working?is there a wire that might be bad?or maybe a line pluged ?
because i have 60 psi at the new pump,that is sitting on the floor,but only
30 psi at the schrader valve,before the gas gets into the regulator and
spider,and there are wires that go to the spider.

1 Answer

80

Most fuel injection systems require 45-60 psi. Try googling the specs first and see where you stand.

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