Measuring Fuel Pressure
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From: West Lafayette, IN
Measuring Fuel Pressure What is the most accurate way to compare the fuel pressure rating (at the rail) of an aftermarket fuel system with the stock pressure rating? In other words, how is the stock fuel pressure rating of 58 PSI obtained? With the pump primed (engine off)? While the car is idling? At WOT?
Thanks,
Josh
Thanks,
Josh
You should have 58 lbs when you turn the key to the on position and when at idle. I think if you have a real good supply system, IE big pump and big lines you will see less drop on your system than if it is stock. at WOT.
then you prob have that line in the tank too loose. the flex hose that you have to tighten with a hose clamp that is. if its too loose or you have a leak elsewhere, then the gauge will go back and forth and sweep about 4 psi range, looks likes its vibrating
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TECH Resident
Joined: Jun 2004
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I like to run a electronic fuel pressure gauge on forced induction FI cars...
I own a shrader valve type diagnostic gauge but I sure feel better seeing beign able to see that the pressure goes up the same # of PSI as my boost gauge..
I own a shrader valve type diagnostic gauge but I sure feel better seeing beign able to see that the pressure goes up the same # of PSI as my boost gauge..
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Joined: Jun 2004
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From: Itasca, IL
I bought a nice diagnostic guage from Murrys. It was 40 bucks but it was worth it for me, even had a little purge. Its also nice because I have an adjustble FPR so I just hooked it up, set it to 58 psi, and I was done.
