Question about 1996 Chevrolet C1500

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1996 chevy 1500 pickup 4.3L vortec.v6 .wont start on its own needs starting fluid when i get it to run have to constantly give it gas till it runs on its own. Heard it was an oil pressure sending unit that could be the problem. any advice will help. where is the osu located and could that be the problem. truck used to just need starting fluid now its getting worse and wont stay running until i give it a bunch of gas till the rpms ketch up.

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  • austinkier Apr 18, 2009

    yea ill gonna try dry gas but i think it would still run if it had watered down gas so im gonna try fuel filter first, then oil pressure switch OSU see what happens after that. gonna work on it tomorrow

  • austinkier Apr 18, 2009

    alright i will

  • austinkier Apr 20, 2009

    Replaced the fuel filter it did need it badly considering the old one was rusted to the lines, but didnt fix the prob. Also replaced the (OSU) oil sensing unit and that didnt fix the prob either. But it will run if i put starting fluid in it i just think the oil pump is slow at start or the fuel pump isnt pumping enough pressure to get it to start.

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I had a problem with fuel pressure due to a bad ground ******** the back of the engine block. This ground connects the battery to the frame through the engine block. The fuel pump is grounded to frame near the gas tank so it needs this ground strap. I live in NY where the salt corrodes the strap in about 10 years.

Posted on Oct 04, 2009

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Underneath the "carberator" is a set of lines that looks like a spider they are made of plastic and have probably got holes in them from old father time change those out and you might get a good running truck ...thats what happened to mine same truck same year and same motor....good luck

Posted on Sep 30, 2009

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Sounds like water in the fuel

Posted on Apr 18, 2009

  • james shack Apr 18, 2009

    let me know what happens. if you dont mind.
    shack


  • james shack Apr 20, 2009

    ck fuel line pressure at schrader valve on the ful rail top of motor

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