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12-25-2018, 09:19 AM
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#1 |
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Registered User
Join Date: Dec 2002
Location: Cactus Patch So. Az
Posts: 4,749
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Fuel Pressure Check Valve
I have a Corvette fuel filter and an in tank pump
Key on I have good pressure 58# as soon as I turn the key off it will bleed down to zero and not hold pressure I would think it should hold pressure for a few minutes.....correct? Is the check valve in the fuel pump or the Wix regulator?
__________________
53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42 |
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12-25-2018, 09:43 AM
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#2 |
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Post Whore
  
Join Date: May 2015
Location: Alabama
Posts: 14,614
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Re: Fuel Pressure Check Valve
mine holds pressure after turning off key...may be check is in the wix reg and the pump..you may want to change it
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver Last edited by mongocanfly; 12-25-2018 at 09:55 AM. |
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12-25-2018, 09:56 AM
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#3 |
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Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,614
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Re: Fuel Pressure Check Valve
Here's a older thread on them....http://67-72chevytrucks.com/vboard/s...d.php?t=699891
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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12-26-2018, 09:44 AM
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#4 |
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Registered User
Join Date: Dec 2002
Location: Cactus Patch So. Az
Posts: 4,749
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Re: Fuel Pressure Check Valve
From what I read there is a check/v in the filter so I will replace that and see what happens.
__________________
53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42 |
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12-27-2018, 09:15 AM
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#5 |
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Registered User
Join Date: Apr 2010
Location: Guntersville Alabama
Posts: 1,073
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Re: Fuel Pressure Check Valve
why are you looking at fuel pressure . Are you having problems . A leaky fuel injector can do the same thing and bleed off pressure as well and cause some problems .
Most all I have seen will bleed off pressure . If it drops to zero in 5 seconds I would look into it . But if bleeds off down to 10 to 15 lbs after a short time after shut down I would not concern myself . The fuel system will still do its job and most likely you will not see any ill affects unless there is a problem . |
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