fuel trouble 99 tahoe

Discussion in 'Engine & Drivetrain' started by melugia, Oct 5, 2017.

  1. melugia

    melugia TYF Newbie

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    John House
    i have a 99 tahoe that i have put all new stuf for the fuel pump,lines, and filter, but i still having a hard time starting it even on starting fluid, i put it on a hand held Snap-on Diagnostics scanner and it doesnt have any codes but when i go to check the injetors as soon as i try number one it stops running,,, any ideals what it might be? remind you im not very good with the Diagnostics scanner. thank you
     
  2. east302

    east302 Full Access Member

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    So it starts and then dies with starting fluid (fuel issue or Passlock security) or won't start at all (no spark) using starter fluid?

    Is the security light on or flashing on the instrument cluster?

    Check the connectors at the VCM, particularly the two grounds at and from the white connector.


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    Check for spark at each cylinder and fuel pressure. Pressure should be 60-66 psi with ignition on, engine off, and hold for a couple minutes after turning off.
     
  3. JollyRoger01

    JollyRoger01 Team America Supporting Member

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    What fuel lines did you replace? I've had several of the injector lines inside the intake crack causing extended crank times. You can clamp off the return line, then install a fuel pressure gauge, cycle the key so the pump primes. If pressure is dropping off quick, I'd start there.
     
  4. bunchz71

    bunchz71 Full Access Member

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    Mine acted this way. Possibly the Spider Injectors. Pretty easy to change. I changed my spider Injectors and it solved my hard starts. Mine would actually run a fully charged battery down trying to start it. Here is the link to the ones I installed. I got them off Amazon. (Not saying this is what it is, but it definitely doesmt hurt, if you have high mileage on your vortec).

    There is a great "How-To" Video on Youtube on the whole procedure.

    https://www.amazon.com/ACDelco-217-...automotive&vehicleId=2&vehicleType=automotive
     

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