2000 Chevy Truck starting troubles

2000 CHEVROLET TRUCK
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MICHAEL SCHERER
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2000 Chevy Truck V8 Two Wheel Drive Automatic 110k miles

hey guys,
i changed my fuel pump,relay, and battery,alternator about 6 months ago. recently, my truck will not start, especially first thing in the morning, it turns over fine,the voltage is good, i hear the fuel pump priming, i have new wires and plugs, getting good spark, have a clean k&n, cleaned throttle body, etc. i had an issue like this except accompanied by the security light flashing a while back, but i changed the ignition and this problem is solved. the truck fires right up with a small shot of starter fluid, and runs great after that, but it still gives trouble starting even after sitting only a few minutes (takes at least 2 tries). when i try in the morning, it will run for under a second and shut off like its out of gas, or a security holdout. but i know the pump,relay, and security system are ok, any other ideas??? i really appreciate it. by the way, its a chevy c series 2500hd with the 5.7 liter 350.
Jul 29, 2009 at 9:54 PM
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MHPAUTOS
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Hi there, this is sounding like the fuel rail is back draining, you will have to hook up a fuel pressure gauge and see how fast the fuel pressure drop off, if its very quick as i expect you may have a faulty pressure regulator or leaking valves in the fuel pump, start here.

mark (mhpautos)
Jul 29, 2009 at 10:34 PM
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