LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Should fuel pressure do this?

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Old Apr 24, 2004 | 04:07 PM
  #1  
rocmemphis's Avatar
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From: Memphis, TN, US
Should fuel pressure do this?

When I hit the gas my fuel pressure shoots up to 50 psi before settling back down at 40 psi. Should it do that or be constant?
Old Apr 24, 2004 | 04:26 PM
  #2  
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When you first hit the throttle hard, vacuum drops quickly. As you ease off, vacuum comes back up. The f/p regulator uses vacuum to control pressure (less vacuum=more pressure), so sounds like it is acting ok.
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