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2003 Chevy Silverado

Tiny
GENGE_CHRIS
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 190,000 MILES
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.
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Thursday, October 7th, 2010 AT 3:55 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Has the check engine light come on? Have you checked fuel pump pressure? Is there any smoke from the exhaust, black, white, blue?
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Thursday, October 7th, 2010 AT 9:54 PM
Tiny
GENGE_CHRIS
  • MEMBER
  • 3 POSTS
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
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Saturday, October 9th, 2010 AT 12:49 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
If it is fuel related, I would recommend checking the fuel pressure regulator. Are you sure you are not losing spark?
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Saturday, October 9th, 2010 AT 1:21 PM
Tiny
GENGE_CHRIS
  • MEMBER
  • 3 POSTS
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
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Saturday, October 9th, 2010 AT 2:01 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
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
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Saturday, October 9th, 2010 AT 11:12 PM

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