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bad fuel pressure regulator, or pump?

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Old Oct 7, 2008 | 04:02 PM
  #1  
85ZzZ4's Avatar
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Joined: Dec 2007
Posts: 29
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From: Indianapolis
Car: 2005 Chevy Colorado/ 1985 Z28
Engine: fast burn zz4
Transmission: th350
Axle/Gears: 10 bolt (has to go) 3:23 gears
bad fuel pressure regulator, or pump?

i am currently running a holley blue pump and holley fuel pressure regulator. the regulator worked fine for about a month, then one day at the track the car started flooding, i checked my fuel pressure guage and sure enough it was pegged at like 14 or something, so i turned the regulator down and as the car idled the guage went right back up... long story short, i bought a new one and it does the same thing... is there any way the fuel pump is bad and pushing too much fuel?!??
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Old Oct 7, 2008 | 04:03 PM
  #2  
Apeiron's Avatar
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Joined: Jan 2000
Posts: 20,981
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: bad fuel pressure regulator, or pump?

Is the return line blocked?
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Old Oct 7, 2008 | 04:54 PM
  #3  
drfrankenstein's Avatar
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Joined: May 2008
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Re: bad fuel pressure regulator, or pump?

iv got that same setup, there isnt a return line. its not a bypass regulator. well atleast thats how mine is.
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Old Oct 7, 2008 | 07:45 PM
  #4  
85ZzZ4's Avatar
Thread Starter
Junior Member
 
Joined: Dec 2007
Posts: 29
Likes: 0
From: Indianapolis
Car: 2005 Chevy Colorado/ 1985 Z28
Engine: fast burn zz4
Transmission: th350
Axle/Gears: 10 bolt (has to go) 3:23 gears
Re: bad fuel pressure regulator, or pump?

no return line in this set-up... can't figure it out, i'm gonna try my buddy's spare pump and see if it makes a difference, but the pump and original regulator are only a month old... i'm lost...
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