Fuel Pressure KOEO
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Senior User
Joined: Jun 2008
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From: Charleston, SC
Fuel Pressure KOEO
I just installed the fuel pressure gauge for my Insight CTS. I connected everything, turned the key on and checked for leaks. Didn't find any. Plugged it into MyStyle and updated it. Put it back in the truck and when I turn the key on, the fuel pressure goes up to 50psi while the pump is on. After the pump turns off, the fuel psi goes back to zero in 10-15 seconds time. I haven't started the truck one, because my 5" straightpipe isn't neighbor friendly at 830pm in my subdivision, and two, wondering if this is normal or if I have a leak somewhere I cant find or fuel draining back out of the filter housing. I didn't pull the fuel filter cap because I don't have a new filter on hand.
Posting Guru
Joined: Dec 2012
Posts: 2,169
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From: SW Florida
50 is low....less than 45 you're doing damage. You're on the edge. Blue spring kit is $40....injectors are $250/each when they fail due to low fp.
Your injectors will be happier and last longer if fp is 60-65 which is what the blue spring will give you.
Your injectors will be happier and last longer if fp is 60-65 which is what the blue spring will give you.
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
The fuel pressure will drop after the fuel pump cuts off. It is normal. I agree that 50 psi is a little on the edge, if it is 50 at idle hopefully it doesn't drop below 45 at wot. With the blue spring mine hovers around 60
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Logistics Pro
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With the blue spring and a new fuel pump I am in the 61-64 range at idle and in the high 50's at WOT.
Hotshot
Joined: Dec 2003
Posts: 15,368
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From: Stuttgart, Ar
I think you're fine. It's on the high side but not unheard of for sure.
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Senior User
Joined: Jun 2008
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From: Charleston, SC
I read on here or powerstroke.org that 76 psi is the max before it hurts the injector o-rings. But I've seen some say 70 is max and others say 90 psi. I did this to help protect the injectors not to hurt them lol. And as far as the EAS fuel pressure, yes you need to buy the starter kit. Only the starter kit plugs into the monitor itself and everything else plugs into that.
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Senior User
Joined: Jun 2008
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From: Charleston, SC
I only buy the filters from the local dealer. The blue spring fixed the low pressure but now I'm worried I have too much since it stays above 70 psi most of the time. Same filters in the truck as before I did the spring.
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