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fdm.jpg FDM & Fuel Pressure
IF THE IMAGE IS TOO SMALL, click it.

The FDM connector shown is for '94-96; '90-93 use the older connector (WPT454) that mounts directly to the FDM plate.

[url=https://www.supermotors.net/registry/2742/77131-4][img]https://www.supermotors.net/getfile/744437/thumbnail/fuellevelwiring.jpg[/img][/url]

For the 5.0L, 5.8L and 7.5L EFI engines, the in-tank mounted high pressure fuel pump is capable of supplying 105 liters (27.7 gallons) of fuel per hour at a working pressure of 270.0 kPa (39 psi). For the 4.9L EFI engine, the pump can supply 90 liters (23.7 gallons) per hour at 380 kPa (55 psi). The pump has an internal pressure relief valve to provide overpressure protection in the event the fuel flow becomes restricted. Overpressure is restricted to 850 kPa (123 psi).

The 4.9L will run fine with the same pressure as the V8s.

Test pressure at the fuel rail with a gauge.

[url=https://www.supermotors.net/registry/media/825934][img]https://www.supermotors.net/getfile/825934/thumbnail/fuelpressuregauge.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/148980][img]https://www.supermotors.net/getfile/148980/thumbnail/5.8l-dist.jpg[/img][/url]

The DLC pinout at the bottom of this diagram DOES NOT APPLY TO '96 trucks since they're OBD-II.  The '87-95 DLC is located under the L hood hinge.  For more info, see these:
[url=https://www.supermotors.net/registry/media/862996][img]https://www.supermotors.net/getfile/862996/thumbnail/dlcjumper.jpg[/img][/url] . [url=https://www.supermotors.net/vehicles/registry/media/245234][img]https://www.supermotors.net/getfile/245234/thumbnail/dlc-eec-iv.jpg[/img][/url]

See this FSA:
[url=https://www.supermotors.net/registry/media/738363][img]https://www.supermotors.net/getfile/738363/thumbnail/fsa01m05fuelcrossflow.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/879227][img]https://www.supermotors.net/getfile/879227/thumbnail/fdmvalve.jpg[/img][/url]

...& this TSB:
[url=https://www.supermotors.net/registry/media/723833][img]https://www.supermotors.net/getfile/723833/thumbnail/tsb88313fuelpressspecs.jpg[/img][/url]

To temporarily or permanently convert a '90-up 2-tank truck to a single tank with no damage & virtually no cost, read this caption:
[url=https//www.supermotors.net/registry/media/862974][img]https://www.supermotors.net/getfile/862974/thumbnail/76solder.jpg[/img][/url]

See also:
[url=https://www.fordparts.com/FileUploads/CMSFiles/18376%20Pigtail%20Book%202016.pdf]MotorCraft 2016 Wiring Pigtail Guide[/url]
fdm.jpg | Hits: 58293 | Posted on: 1/20/06 | View original size (275.71 KB)

FDM & Fuel Pressure
IF THE IMAGE IS TOO SMALL, click it.

The FDM connector shown is for '94-96; '90-93 use the older connector (WPT454) that mounts directly to the FDM plate.



For the 5.0L, 5.8L and 7.5L EFI engines, the in-tank mounted high pressure fuel pump is capable of supplying 105 liters (27.7 gallons) of fuel per hour at a working pressure of 270.0 kPa (39 psi). For the 4.9L EFI engine, the pump can supply 90 liters (23.7 gallons) per hour at 380 kPa (55 psi). The pump has an internal pressure relief valve to provide overpressure protection in the event the fuel flow becomes restricted. Overpressure is restricted to 850 kPa (123 psi).

The 4.9L will run fine with the same pressure as the V8s.

Test pressure at the fuel rail with a gauge.

.

The DLC pinout at the bottom of this diagram DOES NOT APPLY TO '96 trucks since they're OBD-II. The '87-95 DLC is located under the L hood hinge. For more info, see these:
.

See this FSA:
.

...& this TSB:


To temporarily or permanently convert a '90-up 2-tank truck to a single tank with no damage & virtually no cost, read this caption:


See also:
MotorCraft 2016 Wiring Pigtail Guide
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