Blue spring!
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Senior User
Joined: Nov 2010
Posts: 172
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From: wildwood, mo.
Blue spring!
Installed the blue spring the day after my fuel pressure gauge. had a new fuel pump 2 weeks ago but the great tech at the dealer didn't bother to check the pressure after the install. Had 50 idling ahd got down to 45 at around 2250. Now have 73 idiling and 65 at wot!!!
Fleet Owner
Joined: Nov 2003
Posts: 27,918
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lenzhotrod posted up the International spec on max fuel pressure in another forum. Their spec is 70 psig. IMO 73 is fine. I think that I am probably the main source for Fords spec. I documented it years ago and now I can not find the specific reference, but I certainly believe it to be accurate. Folks on the other forum I mentioned are debating whether or not the 100 psig from the GDS spring is really all that bad. Some people have been using it for 20k + miles and no issues yet. Who knows if or when you might see problems, but I do know that it doesn't get you anything ........ except more risk.
Thread Starter
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Senior User
Joined: Nov 2010
Posts: 172
Likes: 0
From: wildwood, mo.
lenzhotrod posted up the International spec on max fuel pressure in another forum. Their spec is 70 psig. IMO 73 is fine. I think that I am probably the mains source for Fords spec. I documented it years ago and now I can not find the reference, but I certainly believe it to be accurate. Folks on the other forum I mentioned are debating whether or not the 100 psig from the GDS spring is really all that bad. Some people have been using it for 20k + miles and no issues yet. Who knows if or when you might see problems, but I do know that it doesn't get you anything ........ except more risk.
I also got that from cheezit! I am sure it is correct! Not saying you are incorrect, just got from another very reliable source.
Fleet Owner
Joined: Nov 2003
Posts: 27,918
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Last time I looked it was - very pleased! I now have the gauge on the degas bottle though. Will put it back to fuel next weekend.
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Junior User
Joined: Oct 2010
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blue spring
i just did the blue spring too. very easy as everone has described. i am around 68-69 psi. nice. i used the international part as it was only $30 instead of 60 or 80. doesnt come with the new outter cover, but who needs that. very happy $30 mod.
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Senior User
Joined: May 2005
Posts: 155
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From: So. Cal.
What's the International part # and did you get it from a dealer or online?
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
You would only feel a power difference if your fuel pressure is already low. It's insurance against injector failure, not a performance mod.