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Old 01-20-2006, 03:29 PM
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richtazz richtazz is offline
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Re: '90 Lumina Issues

Check fuel pressure at the rail. It sounds like you have either a fuel pump or fuel pressure regulator problem. Pressure should be 31-34 psi, key on engine off, and should raise slightly with the engine running and as RPM increases. Check for raw fuel in the vacuum supply line to the fuel pressure regulator, as this would indicate a leaky diaphragm.
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