fuel pressure

1997 CHEVROLET BLAZER
150,000 MILES • 4.3L • V6 • 4WD • AUTOMATIC
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AKRUMREY
  • MEMBER
  • 1 POST
I am getting 50 psi for fuel pressure and it should be 56-62 psi. There are no vacuum leaks, I tested for them, I installed a brand new Chevrolet fuel pump and fuel pressure regulator.
Oct 16, 2017 at 8:38 AM
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STEVE W.
  • ✓Experienced Mechanic
  • 15,367 POSTS
Check the voltage at the battery and pump. Bad connections or corrosion in line or through the relay can cause a voltage drop that would give you lower pressure if the pump is running slow.
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Oct 16, 2017 at 8:49 AM
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