ATTENTION: Ford has released that 7.3L and 6.0L Ford Powerstroke injector failure can
be due to LOW fuel pressure. THIS IS THE FIX FORD HAS BEEN LOOKING FOR. SAVE
ON COSTLY REPAIR BILLS, GAIN MPG AND UP TO A 20HP GAIN!!
The stock fuel pressure spring runs about 50-55psi on a 6.0L and 60-80psi on a 7.3L at idle give or take some depending
how long it has been run and the condition of the pump. Fuel pressure can add both power, drivability and fuel mileage. This is also a must
when chips, tuners and larger injectors have been added.
The EightySixd Fuel Pressure Spring differs from the stock spring in two ways:
First is in fuel pressure. It raises fuel pressure in both the 6.0L and 7.3L Ford engine models.
For example: On a stock 6.0L fuel pressure is 50-55psi at idle and 39psi at WOT. The EightySixd spring raises it to about 75-80psi at idle and 50-psi at WOT.
Ford's WOT test says it should be 50-55psi to prevent injector failure.
Second difference is in pressure loss due to cyclic fatigue. The stock spring loses about 25% of
its spring tension in 10,000 cycles. The EightySixd spring loses about 1% to 3% of its spring
tension in 1,000,000 cycles. Not bad for a $25.00 upgrade that can be installed in 15 minutes!!
Installation is simple and requires no special tools (except for a T-27 torque bit). You simply
remove the pump cover pieces and then remove the T-27 torque screws (Four on the 6.0L and Two on the 7.3L) on the
drivers side of the pump. Carefully separate the line from the pump and remove the spring (careful
not to lose or damage the o-ring seal). Install the new spring making sure it seats properly and
put it back together. It is very important to make sure the o-ring stays in its proper place.
This fix will permanently optimize fuel pressure the right way and prevent the need for trying to
achieve the same results by using potentially damaging and leak-causing shimming of the weak stock
EightySixd Fuel Pressure Spring works on the following Ford Powerstrokes:
1998-2007 Ford 7.3L & 6.0L Powerstrokes
OPTIONAL: Genuine Ford Key Hole Gasket can be added to 6.0L spring orders.