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  1. 2

    Fuel issues after installing fuel pressure relief valve and shim kit

    So I figured out what it was. I took the fprv back out and apart and it was missing the tiny little needle that fits inside the hole.
  2. 2

    Fuel issues after installing fuel pressure relief valve and shim kit

    I recently took out the old fprv on my 2004.5 gmc sierra lly and installed a new bosch one a put the 2 washer shim kit in it. Then I turned it over and it started up after about 10 seconds and I drove it around the block. Before I installed the new fprv, I never had any issues and it was running...
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