Question about 1999 GMC Safari

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My van will not run i have change fuel pump,filter

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Try to see if you have a fuel pump relay and a fuel pump cutoff switch( fuel pump shutoff is for if you roll the vehicle or have an accident). Also, you may have a bad fuel pressure regulator. I don't know what type of fuel injection you have but the regulator is on the fuel rail for multiport injection and on the TBI for throttle body injection..the best way to check for proper fuel pressure is to get a fuel pressure tester and connect it to the fuel rail( the connector looks like that of a valve stem)...on the multi port the pressure should be around 40-60psi and on the TBI it should be around 15-25psi. If all else, then check to see that the injectors are ok

Posted on Jan 03, 2011

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Posted on Jan 02, 2017

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1 Answer

Leak on fuel line e 150 1991


Change the Fuel Filter the process is
  • 1

    Park the van on a flat, level surface. Ensure the parking brake is set.

  • 2

    Open the hood to locate the fuse panel. The fuse panel is located by the battery. Find the relay for the fuel pump and pull it out by hand.


  • 3

    Start the van and allow it to idle until it stalls out. This will depressurize the fuel system.

  • 4

    Locate the fuel filter under the van. The filter is located by the driver door mounted along the frame rail.

  • 5

    Disconnect the inlet fuel line with the quick-disconnect tool. This tool can be purchased at any automotive-parts stores. Place the tool over the connection and pull it toward the filter. This will release the fuel line from the filter. Repeat to release the line on the outlet end. Place a piece of masking tape over the inlet line to help remember which line is which. The inlet line is the line coming from the fuel tank into the filter. The outlet line is the line that runs to the engine from the filter.

  • 6

    Unbolt the filter from the bracket assembly. Slide the filter from the bracket.

  • 7

    Slide the new filter to the mounting bracket. Tighten the bracket with a socket wrench. Ensure the arrow is pointing toward the front of the van. The arrow designates the direction of the fuel flow.

  • 8

    Push the inlet line onto the filter. The line will lock in place. Ensure the tape is removed before installing. Connect the outlet line to the filter. It will lock in place also.

  • 9

    Insert the fuel pump relay back into the fuse panel. This will pressurize the fuel system.

  • 10

    Turn the ignition to the "start" position and allow the fuel pump to prime itself and push fuel through the lines. Attempt to start the van; it may not start right away. Once the van has started allow it to run for five minutes and observe for leaks.


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