Question about 1997 Pontiac Trans Sport

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How do i know if the fuel pump is not working

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For most vehicles, turn key to on (not start). Fuel pump should run for a few seconds. Listen for pump motor sound.

Posted on Jul 25, 2009

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Do not attempt this unless you know your way around under the hood.
Use protective gear: safety glasses and protective gloves.
Somewhere on or near the fuel rail on your engine will be a plastic cap that is the same as a tire valve cap. Remove it. Underneath will be a pressure release valve, also much like your tire valve.
Cycle your key to the on position (not the start position) for 2-5 seconds. Turn key back to off position. Immediately go to the valve on the fuel rail and push the needle down. If the fuel pump is working, you shouls have fuel spray out of the valve quite quickly. The pressure in the fuel rail is about 40-50psi if the pump is working.
Hope this helps!

Posted on Jul 25, 2009

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