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Fuel pressure

Tiny
AKRUMREY
  • MEMBER
  • 1997 CHEVROLET BLAZER
  • 4.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
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.
Monday, October 16th, 2017 AT 3:38 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 13,473 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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Monday, October 16th, 2017 AT 3:49 PM

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