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Will not start

Discussion in '1983-2005 S-Series models' started by MA87K5, Nov 13, 2005.

  1. MA87K5

    MA87K5 1/2 ton status

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    I have a 97 Blazer 4.3L that will not start. I checked the pump plug and got no power with the key on. No power at the relay when the key is turned on. I even disconnected the oil pressure switch to bypass the switch. Still no go. I have batt power at the relay but no ignition key power. When I manually actuated the relay the pump came on. I'm leaning torward the computer. Please help me and let me know if I'm correct or not. Also fuse is good.
    Thanks.
     
  2. 1979jimmy350

    1979jimmy350 1/2 ton status

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    are you able to get any codes with a reader? if you are, check for thoese first. Then check the wire that runs to the computer from the relay for an open before you buy a new computer. Also if you know any body with the same year blazer see if your computer will work theirs. I had some problems with my s-10 blazer a few weeks ago and was ready to go spend 150 on a new computer unitl i pluged it into a friends and it worked
     
  3. MA87K5

    MA87K5 1/2 ton status

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    Checked all the connections and found no open connections. Still leaning to the computer.
     
  4. MA87K5

    MA87K5 1/2 ton status

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    update very long overdue. Turned out to be the ignition switch.
     

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