Question about 1999 Chevrolet K1500

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My '99 chevy truck with 5,7L 350 will start but wont stay running. put new fuel pump and relay switch in

It will fire and run for a few then die, let set a min and it will fire again and run for few then die. I put a new fuel pump in it and filter and fuel pump relay still wont stay running also put new plugs and wires in still wont stay running ????

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  • papahop May 18, 2014

    check the fuel regulater should be top intake by fuel rail or line behind throttle body

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  • Chevrolet Master
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First you must determine if the fuel is stopping or the spark is stopping..If the fuel is stopping this could be a computer problem.. If the spark is stopping then it could be the IGN Module in the distributer. or any nomber of sensors. Squirt a little fuel directly into the Throttle body on the intake manifold.. If the truck runs longer its probably loss of fuel.. Do this several times to make sure, be careful and only use a small amounty of fuel.. you do not want a fire.. RE: Spark: Take a plug wire and an old plug..put the wire on the plug.. hold the plug against a good ground .. have someone crank the engine .. does the plug stop firing? The engine dies.. and will not restart for a minuet or so.. during this "no start" time do the plug test. If the plug will not fire during this time take the module out and take it to Orillys Auto parts.. They can test it.. really expensive part. Don't replace until you know it is BAD..

Posted on May 14, 2014

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Posted on Jan 02, 2017

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  • 341 Answers

SOURCE: 98 chevy camaro wont start

check fuel pressure regulator

Posted on Dec 06, 2008

  • 1 Answer

SOURCE: 2000 chevy silverado 1500 4.3 eng

Chevy Trucks, Blazers, S10 pickup and the like will vapor lock ecspecially the 2000 models. Do not tighten the gas cap past 1 click. There is a tube that runs from the top of the tank down and this gets hot and collapses or burns in half. We just bought a reinforced rubber tube cut it to lengh and use it instead of part and it's worked grat for 2 years so far.

Posted on Feb 01, 2009

  • 34 Answers

SOURCE: 1997 chevy silverado 1500 350 vortech, new fule pump not working

before you drop tank again, check fuses & relay.then disconnect fuel line @ filter turn key to on position should hear fuel pump run and get gas stream out of line. if no flow from line new pump faulty be sure & remove negative battery cable first good luck.

Posted on Jun 20, 2009

  • 3600 Answers

SOURCE: 90 chevy k1500 350 tbi fuel problem starts but wont stay running

try bypassing the oil pressure switch on the back of the block behind the distributor, if there oil pressure switch goes bad it will do this. had one that drove me nuts trying to fix it then figured out I had to buy a book and low and behold thee it was 3 wire oil pressure switch you can't see between the engine and fire wall just behind the distributor and costs 8 bucks to buy new.

Posted on Jan 16, 2010

  • 183 Answers

SOURCE: I have a 1988 Chevy K2500, V8-350 cu. in with TBI.

Oil pressure switch puts power to the pump after it is started.

Pumps also tend to loose their ground with age. I often splice in a new ground at the pump to eliminate that problem area.

Need some votes, thanks

Posted on Aug 22, 2010

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1 Answer

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I have 1993 chevy 4.3 pickup that about every three years does the same thing it was the fuel pump relay located on passenger side of firewall under a plastic flap. I went to parts store told them my vehicle and got relay took 5 minutes runs fine again Semper Fi!

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I have a 1988 Chevy K2500, V8-350 cu. in with TBI. I have fire, but there is no fire running to the fuel pump. There is a new fuel pump relay installed and the fuse is also good. Truck ran fine, then...


Oil pressure switch puts power to the pump after it is started.

Pumps also tend to loose their ground with age. I often splice in a new ground at the pump to eliminate that problem area.

Need some votes, thanks

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90 chevy k1500 350 tbi fuel problem starts but wont stay running


try bypassing the oil pressure switch on the back of the block behind the distributor, if there oil pressure switch goes bad it will do this. had one that drove me nuts trying to fix it then figured out I had to buy a book and low and behold thee it was 3 wire oil pressure switch you can't see between the engine and fire wall just behind the distributor and costs 8 bucks to buy new.

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I have a 90 chevy k1500 350 tbi with same problem! I have traced problem to... after turning on key fuel pump kicks on when u crank it over injectors shoot gas and truck starts! After few seconds injectors stop spraying and truck dies! This can happen many times over and over! Eventually sometimes truck stays running and all is great! I changed ignition module, oil pressure sending unit (which i was told controls gas after vehicle is running) fuel filter, computer, fuel pump relay, I am at a loss now! Hope this helps and hope someone can help me!

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let me know if ya can do this or if it helps.

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