Here's some info and pictures of my Blue Spring Update.
Upgraded fuel pressure regulator kit (with cover): Ford#3C3Z-9T517-AG IH #1843065C98
Fuel Pressure Regulator "Spring and Reseal Kit Only" (no cover, should be much cheaper, has gasket): Ford#6E7Z-
Regulator cover gasket only: Ford#3C32-9C065-AA
The kit comes with a spring that will raise you fuel pressure 10-15psi. It is recommended that fuel pressure be at
least 45psi at wide open throttle and stay below 90psi. while it's a good idea to test pressure before doing this
update it is unlikely to over pressureize a properly working system.
In this picture I have drained a couple of gallons of coolant, removed the air filter assembly, removed the upper
radiator hose. I also loosened the lower CAC tube to intercooler clamp and disconnected the upper CAC tube from the
elbow on the intake manifold and twisted the tube up and out of the way. I have labeled the test port plug- this is
where a gauge can be hooked up to monitor pressure. The head of the plug takes a 6mm allen wrench and the thread
pitch in the hole is metric M12x1.5. most gauges are 1/8 NPT so an adapter fitting would be required. I also labeled
the fuel line fittings to illustrate "Double Wrenching" of the fittings. If the adapter backs out of the housing
before the nut breaks loose from the fitting, the line will twist and can easily be damaged. If you are replacing
the cover, loosen the adapter fitting from the cover before removing it from the regulator housing.
In this picture, you can see the clean spot on the manifold where the fuel as leaking from the cover. The wiring
harness was soft and sticky from being fuel soaked. The wiring should be looked at closely, cleaned up an re-wrapped
if you've been leaking here. A good way to remove oil from the wiring and connectors is with a can of "air" from the
computer section at Wal-mart. If you hold the can up side down while you spray, it will dispense liquid that will
evaporate all the oil. be carefull not to spray your hands as it is VERY cold when used like that. there are also
spray solvents available designed for that purpose, but they are much more expensive than the air in a can.
Here's the kit (3C3Z-9T517-AG $64.62 from my local dealership) spread out.
Nice write-up, I'm sure it will help someone especially with all the questions about it on here lately.
My truck has the plastic CAC tube as well and its always a fight to get it on and off. The best way I've found is to grab it right after the 90 degree bend where it heads down to the intercooler. Push from there while wiggling it at the same time. Takes a bit of force but it works much better than holding it by the opening.
. note the
little white plastic piece at the top of the groove in the housing.
Dont forget the little plastic piece that
goes in the top of the channel, and the tiny o-ring on the backside of it.
i just replaced mine while it was out of the truck during my BPD install, that little white part at the top of the housing in the picture has a small white tube, i swapped it out and it didn't want to sit properly, so i took it off and noticed the little white tube behind that part is now cracked, is this a problem?
also, i am not really clear as to how this spring helps when looking at it disassembled, im assuming this spring is used as a controlled "leak" and that by placing a stiffer spring it keeps the pressure from dropping by leaking by the brass piece?