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If my tahoe fuel pressure is 40 psi and slowly dropes does that mean pump bad or leaking fuel lines

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Well, do you smell fuel once the system is charged and not running? Do you see any fuel on ground or along fuel line? There are only a few connections where it could possibly leak. Most likely though is you are correct in assuming that the pump is bad. It should hold pressure. Are you having problems starting the vehicle, or does it take longer to start than it used to? If so it's the pump.

Posted on Oct 19, 2013

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Posted on Jan 02, 2017

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SOURCE: 1999 chevy blazer fuel problem

probably not fuel filter . probably going to have to remove the upper intake and replace the fuel injector spider(fuel inj assebly) if it is droping fuel pressure it is leaking into the upper manifold

Posted on Nov 30, 2008

  • 220 Answers

SOURCE: fuel pressure problem.I replaced the fuel pump on 2001 chevy s-10

Most fuel injected vehicles have a relay that controls the fuel pump so after the ignition switch has been on for about 5 seconds and the engine is not running, the fuel pump automatically shuts off.
I don't know what your original problem was, but I think if the car runs normally, you have probably fixed your problem. If you don't have a manual, you can probably go to the library and take a look at a manual that covers your vehicle.

Posted on Jan 16, 2009

  • 333 Answers

SOURCE: low fuel pressure 1996 savana 5.7 V8 central sfi

The only thing left in this system is the fuel pressure regulator. You need to check pressure before the regulator and after the regulator if there is the problem then you need to replace it. I hope this helps. Don't forget to rate my answer.

Posted on Feb 18, 2009

michigan man
  • 3533 Answers

SOURCE: I have a 2000 chevy blazer , before start up , I

if you have done all the above go ahead and replace the fuel pressure regulator and check the intake manifold gasket for leaks if you need any GM parts you can try Schram auto and truck parts 1-800-292-1032

Posted on Mar 20, 2009

Bat1956
  • 585 Answers

SOURCE: Fuel not getting to cylinders...pump, regualator, other?

The pump should be capable of at least 60 psi with the return capped. I seriously doubt that the pump is at fault. I fought with this myself once going through three pumps before I found the leak in the flexible line in the tank that goes from pump to metal line.

Posted on May 10, 2009

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1996 2-door Chevy Tahoe won't start.


On the driverside of the engine towards the back of the intake your fuel lines run there. you will see a black cap that covers the fuel pressure test port. you will need to get a pressure tester if you do not have one. it will screw onto the fitting there. your pressure should be 40 to 60 psi. as for the fuel pump it is located in the fuel tank. it is the fuel module. it contains the fuel pump and sending unit. I hope this helps.
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