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Old Aug 11, 2011 | 08:25 AM
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Flaco_GST
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Default 2002 GMC Problems

2002 GMC 4.3L vortec V-6 with throttle body CPI. Was only pushing 20psi fuel pressure, no start. Replaced fuel pump now pushing 60psi with key on & pump running, drops to 52psi when pump shuts off. Will start & run in park, a little rough, runs at 52-54psi. No power & wants to stall in gear. Specs call for 60-66psi. Replaced all retainers on plastic flex lines.
Any Ideas?
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