2003 Chevy Silverado

2003 CHEVROLET SILVERADO
190,000 MILES • V8 • 4WD • AUTOMATIC
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GENGE_CHRIS
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After i run my machine for approx. 10 minutes it starts acting funny. I changed the oxygen sensor that was bad(wire was chaffed), changed spark plugs, changed fuel pump and filter, air filter, catalytic converters are not plugged. It starts by shaking and vibrating while i'm driving than she stalls out. It happens after she warms up like i start it in the morning after a brisk night and she runs for 10 to 15 minutes than starts acting weird than stalls out and than it takes a while for it to start back up. when i try to start it after it stalls it's like she's not getting her gas and she won't start.
Oct 7, 2010 at 3:55 PM
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JACOBANDNICKOLAS
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Has the check engine light come on? Have you checked fuel pump pressure? Is there any smoke from the exhaust, black, white, blue...?
Oct 7, 2010 at 9:54 PM
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GENGE_CHRIS
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the Check engine light has not come on, there seems to be no smoke coming from the exhaust and there is lots of pressure coming from the port on the fuel line. Could it possibly be the fuel sending unit?? and how much is a new one
Oct 9, 2010 at 12:49 PM
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JACOBANDNICKOLAS
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If it is fuel related, I would recommend checking the fuel pressure regulator. Are you sure you are not losing spark?
Oct 9, 2010 at 1:21 PM
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GENGE_CHRIS
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no i checked all the spark plugs and had spark on all of them. The fuel pressure regulator is located where and how would i know if it's shot
Oct 9, 2010 at 2:01 PM
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JACOBANDNICKOLAS
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Here is a how to for checking fuel pump pressure. It also shows how to check the regulator and basic location. Make sure to pull the vacuum line off the regulator and make sure there is no fuel getting into it.

https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

Let me know what you find.
Joe
Oct 9, 2010 at 11:12 PM