Fuel Pressure Issues -- Need some Help!

xtreme02gt

1 Slow GT!
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Mar 23, 2005
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3,478
Location
Austin TX
I have the GT500 fuel system ( JDM Saleen Extreme Kit )



I need some help, here is the deal. When I am just driving around my fuel pressure is 37-38psi, but if I hammer on it, it will jump up to 50-55psi, soon as I let off the gas, my fuel pressure drops all the way down to 16-18psi, and then it will come back up to 22-24psi, and will stay there. So what the hell?



But, if I put my foot back in it, it will jump back up to the 40's but comes right back down to 22-24psi, and if I just tap the gas, it will jump up to 49-52, and then drop all way down to 5-8psi... I just can't figure this out....



Can ya'll help me out?
 

kleistang

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May 12, 2009
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405
Location
Miami
check the lines in the hat also, make sure they are not loose. when u put the new pumps try to use fuel lines with clamps, instead of the white flex hoses.
 

bergs

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Oct 13, 2008
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353
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West Caldwell, NJ
what should the gauge read if everything was good? dosent the pump increase psi as rpms and load are increased? and then ease up on the flow as you come down?
 

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