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#1
08-24-2006, 09:59 PM
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Fuel Pressure
I have recently installed a fuel pressure gauge on my 98 eclipse gs n/t and the fuel pressure ranges from 48 psi to 60 psi. Is this normall for it to vary in psi all the time. If not how can you fix it so that it is constant.
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#2
08-24-2006, 10:03 PM
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Re: Fuel Pressure
I don't know about a n/t setups but in the turbo setups, the stock fuel pressure solenoid will raise fuel pressure with the rising boost... I believe its a 1:1 ratio for our cars... I wouldn't think that it would be the same for a n/t but it very well could be I suppose.
Did you run an electronic or mechanical fuel pressure gauge and what did you tap into if you are running the stock FPS still?
__________________
-Brian
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#3
08-24-2006, 10:47 PM
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Re: Fuel Pressure
it's an elactronical gauge the pressure sender unit is on the end of my fuel rail. i have a fuel line hose conneting my fuel pressure sender to the fuel rail with hose clamps on both ends. I checked and when the car is running there is no fuel leaking at all.
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#4
08-24-2006, 11:11 PM
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Re: Fuel Pressure
Well if there is no leaks and its using the proper sender for signal then it must be normal for a n/t dsm as well...
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-Brian
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#5
08-25-2006, 12:26 AM
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Re: Fuel Pressure
Can I ask why you did this?
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'92 3000gt SL Zoom Stage 1 Clutch Quote:
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#6
08-25-2006, 01:28 AM
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Re: Fuel Pressure
Pressure is supposed to be a 47-50 at idle without vacuum. It will vary as engine speed goes up because of the amount of fuel flowing. Does it vary at one speed, or will it stay at 48 at idle and go up to 60 during driving?
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95 Talon TSI AWD 97 Eclipse GST 
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#7
08-25-2006, 08:52 AM
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Re: Fuel Pressure
That seems about right, funny thing is, I cant explain why.
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 Build on hold until I get a good paying job, either in school or once I get out. At that time a full tear down and complete rebuild should be in order. The Purple People Eater will ride again... January 2011 can't come soon enough.
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#8
08-25-2006, 11:22 AM
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Re: Fuel Pressure
some times when i start the car it will be 60 and some times it will be 48 it varies ever time i start my car.
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#9
08-25-2006, 12:44 PM
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Re: Fuel Pressure
Quote:
I wonder if his fuel pump is gettin ready to bite the dust...
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-Brian
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#10
08-25-2006, 07:48 PM
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Re: Fuel Pressure
On an NT car fuel pressure should only drop from base pressure, 1:1, same as turbo cars. But it should not be going up, for obvious reasons.
 It has to drop with vacuum, otherwise the injectors will appear "bigger" the higher the vacuum goes, so the fact that is is changing is in itself normal. Being higher than base seems unusual to me. I would double check base pressure (vac hose removed).
__________________
Kevin Jewer RWD Talon - 7.92 at 180 Mightymax - 10.7 at 125
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#11
08-25-2006, 09:39 PM
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Re: Fuel Pressure
Quote:
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now - 2000 civic soon - 2002 is300 
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