2000 Silverado running poorly

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2000 Silverado running poorly

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Chevrolet Forums >> Chevy Trucks, Vans & SUV's >> Silverado >> 2000 Silverado running poorly

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2000 Silverado running poorly - 2/27/2008 1:29:55 PM

Houston36

Posts: 8
Joined: 2/27/2008
Status: offline

2000 Silverado z71 ext cab
5.3 170000 miles

Problem started with the truck idling rough every now and then. It would start up and idle and bounce between 400 and 800 rpms then stall out. Periodically while highway driving it would feel like it hit a flat spot but would pull out of it. a few times while driving it would lose all power and when i tried to accelerate it would start to bog down until i let off and once died an wouldt start for a few hours. Since then ive put new plugs and wires and a fuel filter. When i replaced the fuel filter it seemed to help the idling problem but dint fix it. But now its so bad i cant drive the truck because when you give it gas it will start to accelerate then start to bog down. it does the same thing in neutral but if you very slowly give it more gas it does fine. Ive checked and all cylinders are getting a good spark but i dont really know where to start beyond that. Any advice would be appreciated.

Thanks

Post #: 1

RE: 2000 Silverado running poorly - 2/27/2008 3:39:46 PM

RonH

Posts: 418
Joined: 1/31/2007
Status: offline

Since you have already checked the fuel filter, it may be the pump. Might start with a pressure check on the fuel system.

< Message edited by RonH -- 2/27/2008 3:40:34 PM >

(in reply to Houston36)

Post #: 2

RE: 2000 Silverado running poorly - 2/27/2008 5:05:07 PM

06chevy5.3

Posts: 137
Joined: 2/5/2008
Status: offline

try cleaning the iac

(in reply to RonH)

Post #: 3

RE: 2000 Silverado running poorly - 2/27/2008 7:15:16 PM

jmack91z28

Posts: 164
Joined: 2/27/2008
Status: offline

Its probably a sensor dealing with the throttle body, like the iac or tps. won't be the fuel pump, pumps don't slowly go out, no electrical issue slowly goes bad. Hopefully it's a simple issue like sensor is giving false readings to the computer. Another thing is, could be a fuel injector going bad or is getting plugged up. I had a camaro that did that and it doesn't give you an engine code, you could try (while vehicle is running) unplugging an injector one at a time, thats how I figured out which one was bad.

(in reply to 06chevy5.3)

Post #: 4

RE: 2000 Silverado running poorly - 2/27/2008 7:19:57 PM

06chevy5.3

Posts: 137
Joined: 2/5/2008
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do u have a k & n filter on there?

(in reply to jmack91z28)

Post #: 5

RE: 2000 Silverado running poorly - 2/27/2008 10:29:38 PM

Houston36

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Joined: 2/27/2008
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no it just stock

(in reply to 06chevy5.3)

Post #: 6

RE: 2000 Silverado running poorly - 2/28/2008 12:06:44 AM

06chevy5.3

Posts: 137
Joined: 2/5/2008
Status: offline

is it clean? did u clean the iac?

(in reply to Houston36)

Post #: 7

RE: 2000 Silverado running poorly - 2/28/2008 12:20:48 PM

Houston36

Posts: 8
Joined: 2/27/2008
Status: offline

Cleaned the iac but didnt make a difference and the air filter is only a couple months old. Another thing is when i crank the truck up and it starts to bog down and sputter and i would tap on the gas a few times to get keep it from dying and it would sputter for a few more seconds then rev up like it was already loaded up with fuel but just not firing but i dont know if that means its in the ignition or not.

(in reply to 06chevy5.3)

Post #: 8

RE: 2000 Silverado running poorly - 2/28/2008 3:13:30 PM

Houston36

Posts: 8
Joined: 2/27/2008
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it also threw a code today that was p0200 which is fuel injector control circuit, incorrect voltage

(in reply to Houston36)

Post #: 9

RE: 2000 Silverado running poorly - 2/28/2008 7:59:24 PM

jmack91z28

Posts: 164
Joined: 2/27/2008
Status: offline

It's probably going to be a bad injector, or could possibly be the actual computer is going bad and putting out wrong signals. You need to get an ohm meter and check the resistance across your injectors and just for the hell of it your sensors dealing with the throttle body. Theres a manual that advance auto parts or someplace like that sells that tells you all of the correct ohms the meter should read across the sensors. It has all the info you could need to turn every bolt on the truck. Did this entire problem just all of the sudden occur, or did it happen after a repair or tune-up? And you said that it progressivly got worse right?

(in reply to Houston36)

Post #: 10