What is this Blue spring in the fuel line I keep reading about?

Fandini · #1 (**permalink**) 03-13-2011, 03:36 PM

I keep seeing people talking about upgrading to a blue spring in the fuel line. What is this? Is it a change that needs to be updated by the dealer? I have a 2006 model, do I still need to consider this?

**psd_va** · #2 (**permalink**) 03-13-2011, 05:20 PM

i am curious about this also

nos487 · #3 (**permalink**) 03-13-2011, 05:39 PM

Read this whole post should help.
upgraded fuel pressure spring

***sinner6.0L*** · #4 (**permalink**) 03-17-2011, 04:06 PM

the stock regulator spring is silver and will regulate fuel pressure to around 55psi. the new updated spring is colored blue so it's possible to distinguish it from the original. the new spring is stiffer and should push your pressure up to 65psi or slightly higher

**SickStroke6.0** · #5 (**permalink**) 03-17-2011, 04:54 PM

I did a write up on it, check it out in my threads or the General 6.0l Discussion.

**psd_va** · #6 (**permalink**) 03-23-2011, 02:34 AM

And where can this little blue spring be purchased from?

***JUGERNAUT*** · #7 (**permalink**) 03-23-2011, 04:14 AM

[ok here is part number im doing 1 right now 3c3z-9t517-ag regulator kit my reading at idle are 74 psi idle and 65psi simulated load.
also this kit has a very important peace the white plastic pease is for the air bleed. 9 out of 10 that i do this is blocked. install it.i will put presure reading up in a bit ok