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2000 chevy Z71 tahoe, lumbar pump low pressure

The lumbar support does not seem to be pumping up far enough. I put a T in the air line and it only puts out 2 psi. It holds that pressure, so the bag must be ok. I can not seem to find out how much pressure a good pump should be putting out. I put 7psi from my regulated air line to it and that seems about right to give good lumbar support. I need to know if the pump is bad only putting out 2psi before I spend the money for a new one. Thanks.

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6ya6ya
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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

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SOURCE: 1998 Chevy tahoe Hard to start when cold

Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.

Posted on Jan 03, 2009

  • 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

  • 74 Answers

SOURCE: 1998 Chevy tahoe Hard to start when cold

replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Posted on Feb 17, 2009

michigan man
  • 3533 Answers

SOURCE: fuel pump not working and keeps blowing the PCM-B fuse. trying to find a way to put an aftermarket pump in line instead of replacing the factory pump.

this something i would not do checkout all of the fuses and the fuel pump relay before you do this try this website www.alldatadiy.com to see if they have you truck listed and i also would like to give you this information if you every have any hard to find GM-parts they sells only GM its Scharm auto & truck parts 1-800-292-1032 and they website is www.schramauto.com and i hope i have been some help to you Michigan Man

Posted on May 24, 2009

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