Damn fuel shizit... Question....
Thread Starter
Captain Catastrophe
Joined: Aug 2001
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Well it seems as if the easiest tasks are the ones with gotchas... I have a simple question and maybe its not a problem at all I can just see this now cause of the new equipment... 
Possible Problem:
When I come home for the evening and park the car in the garage and it cools for about 3-4hrs... the fuel pressure is sitting at 0. I find this odd since there are NO fuel leaks ANYWHERE. I looked throughout the fuel system right after a full throttle run and not a drop... nothing... So is this behavior normal? If not any advice?
Thanks guys/gals....
Possible Problem:
When I come home for the evening and park the car in the garage and it cools for about 3-4hrs... the fuel pressure is sitting at 0. I find this odd since there are NO fuel leaks ANYWHERE. I looked throughout the fuel system right after a full throttle run and not a drop... nothing... So is this behavior normal? If not any advice?
Thanks guys/gals....
Guest
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This is just my rational so take it for what its worth usually after sitting for awhile the fuel finds itself back into the fuel tank relieving pressure. When you start the car up and turn the key to the on (not crank) position the fuel pump turns on to build up pressure first. So not having any pressure int the system after 3-4 hours would be fine.
Robster
Robster
Livin' in Seattle
Joined: Nov 2000
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Have you had any fuel related MILs?
The Honda fuel system is set up to maintain fuel pressure in the system. The line from the pump has a check valve in it that doesnt allow back flow and the FPR regulates the pressure in the system. When the car is shut off theoritically the fuel should remain pressurized and in the system because of the check valve and due to the FPR having no vacuum can being closed.
Some results of this leak can be having to crank the car over more to start and fuel related codes such as 45 since the long term fuel trim is being affected.
The Honda fuel system is set up to maintain fuel pressure in the system. The line from the pump has a check valve in it that doesnt allow back flow and the FPR regulates the pressure in the system. When the car is shut off theoritically the fuel should remain pressurized and in the system because of the check valve and due to the FPR having no vacuum can being closed.
Some results of this leak can be having to crank the car over more to start and fuel related codes such as 45 since the long term fuel trim is being affected.
Livin' in Seattle
Joined: Nov 2000
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Is it a gradual loss like over a few days or a loss that occurs within a few hours? Normally you dont want a drop in static pressure of more than 10psi or so.
Causes can be a bad check valve on the fuel pump bad FPR or leaky injectors. If its a gradual loss over an extended time period I wouldnt worry about it too much. Its still a concern though but nothing urgent.
Causes can be a bad check valve on the fuel pump bad FPR or leaky injectors. If its a gradual loss over an extended time period I wouldnt worry about it too much. Its still a concern though but nothing urgent.
Wherever I may roam...
Joined: Mar 2001
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mine does the same thing.
that would explain why it takes longer to start after its been sitting for a bit.
that would explain why it takes longer to start after its been sitting for a bit.
Wherever I may roam...
Joined: Mar 2001
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Mine also does the same
Livin' in Seattle
Joined: Nov 2000
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Well lets set some things straight then. There should be static pressure in the system no if ands or buts. As for how long that static pressure remains I guess that is what can be debated. Like I said above if your static pressure drops off quickly then you have a problem but if its a gradual loss over time then its not really that big a concern. My guess is that the check valve at the fuel pump isnt exactly 100% leak free.
