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post #1 of 8 Old 09-08-2011, 03:13 PM Thread Starter
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fuel pressure

hey all, im new to the forum
i have an 04 f350, 6.0 diesel. i installed the blue fuel pressure spring kit, and a new fuel pump installed prior to that. i have an autometer pillar guage set up with fuel pressure. my pressure at idle is about 57 to 60 psi if im lucky and drops 5 to 7 psi at wot. some others ive talked to said they were getting 67 psi at idle with slightly less drop at wot.
any thoughts?
thanks
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post #2 of 8 Old 09-08-2011, 03:38 PM
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So are you saying it drops all the way down to 5 or 7 psi or that it only drops 5-7 psi from say 58 psi?

If it is only dropping to just above 50 psi at WOT then I would say you are good and wouldnt worry about it. If you want less drop than that then get an Airdog II and maybe even a RR kit.

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post #3 of 8 Old 09-08-2011, 03:57 PM Thread Starter
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Yeah pressure only drops 5 to 7 psi from 58 psi. Was more curious if the pressure at idle was low having an extreme tune, new pump and the blue spring, others have said their pressures have been around 67. Feels like fuel starving at wot but pressure still above 50 psi.
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post #4 of 8 Old 09-08-2011, 04:07 PM
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Yea couldnt tell you what the blue spring is suppose to be at because I have a RR kit on mine and have it set at 58 psi. I couldnt tell a difference in performance from being set like that or when I had it as high as 70 psi. I only have a guage for setting it but cant see what it does when running.

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post #5 of 8 Old 09-08-2011, 04:19 PM Thread Starter
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Ok was curious. Thanks for the info. I'm sure ill have plenty others down the road
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post #6 of 8 Old 09-08-2011, 05:59 PM
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i have the blue spring installed also with custom tune from matt (srl)
when i first start my truck up, my fuel pressure is usually about 60, as i get a few miles down the road it works it way up to about 65ish. when i first put the spring in i was at about 68-72 all the time but after about a week it settled down.

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post #7 of 8 Old 09-08-2011, 06:51 PM Thread Starter
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Quote:
Originally Posted by travisH3 View Post
i have the blue spring installed also with custom tune from matt (srl)
when i first start my truck up, my fuel pressure is usually about 60, as i get a few miles down the road it works it way up to about 65ish. when i first put the spring in i was at about 68-72 all the time but after about a week it settled down.
Mine has never gottin above 60 psi. Usually moves between 55 and 60. Seems to be closer to 60 if I have more fuel in the tank also. Drops almost to 50 when I'm on it. I bout this truck used, and before I installed the spring kit I was gettin 45ish and would drop into the 37 area at wot. And I bought it already modded also. Not sure exaclty what has been done other then visable things. Would higher flow injectors do this?
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post #8 of 8 Old 09-08-2011, 06:52 PM Thread Starter
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Scratch that last part if it was injectors my fuel pressure with engine off would be higher then. Its the same engine on or off. Even if I cycle the key
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