2005 Chevrolet Trailblazer Car Will Start Checked Fuel Pressure Holds 57 Pounds

2005 CHEVROLET TRAILBLAZER
70,000 MILES
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LEE628
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car will not start i have checked the fuel pressure it holds at 57 pounds. if it does start it acts like it is running rich for a few seconds then clears up.if i remove the fuel relay it will start til it runs out of pressure. i have cleaned the throttle body and still the same. what other sensors can i check. the engine light is not on and i have no codes
Nov 2, 2012 at 3:18 PM
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DRCRANKNWRENCH
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The fuel pressure regulator may have some sort of problem. Also a bad oxygen snesor can cause that sort of issue. You might also check the idle air control valve, IACV to make sure it is working properly.
Nov 2, 2012 at 3:27 PM
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LEE628
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the fuel pressure regulator is not a seperate it is built into the fuel pump from what i am told. the fuel pressure is what is listed in the repair book and holds this pressure with no loss of pressure. would any of these sensors show a code ?
Nov 2, 2012 at 3:38 PM
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DRCRANKNWRENCH
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Oxygen sensors should show a code.
Nov 3, 2012 at 4:11 AM
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