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92 tpi 350 low fuel pressure

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Old Nov 18, 2006 | 05:20 PM
  #1  
92zcamaroperson's Avatar
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Car: 92 z28 25th
Engine: 5.7 liter
Transmission: 700-R4
92 tpi 350 low fuel pressure

threw a guage on my motor out of curiosity and at idle the fuel pressure is at 35 psi. Does that sound right? i thought idle pressure was supposed to be 45psi. When i rev the motor the pressure spikes to 50psi and returns to 35psi.
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Old Nov 18, 2006 | 05:37 PM
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Drac0nic's Avatar
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Did you pull the vacuum line off the regulator? If not you didn't really check the base FP.
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Old Nov 18, 2006 | 11:18 PM
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Car: 1991 GTA
Engine: SuperRam 350
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Axle/Gears: 3.73
Fuel pressure with the vacuum still connected to the regulator will be about 7-8 psi lower for a smoother idle. Do as Drac0nic says to get an accurate reading.
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Old Nov 20, 2006 | 10:34 AM
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92zcamaroperson's Avatar
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Car: 92 z28 25th
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Transmission: 700-R4
cool. no i didnt disconnect it. Ill try that. Am i right in thinking the base pressure should be 45 psi? 45 with the line connected or disconnected?
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Old Nov 22, 2006 | 09:55 PM
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nikkev's Avatar
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From: Charleston,SC
Car: 1985 IROC
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Originally Posted by 92zcamaroperson
cool. no i didnt disconnect it. Ill try that. Am i right in thinking the base pressure should be 45 psi? 45 with the line connected or disconnected?
45 or so with the vacuum line removed. 37 or so with it attatched.
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