i have a f 150 2006 4.2 liter(basic truck stanard)60.000 km. yesterday the engine just started chugging and quit i changed the fuel filter i turned the engine over and the pump did not work when the filter was off so i pushed the emergency shut off button still nothing one question is i pushed the button in it didn,t click or anything is that how it works? i have checked all the fuses and grounds what would cause the fuel pump not to work? or what should i check next?
thanks

 

If you're sure you don't hear the pump turn on when you cycle the key to on it's possible it is the inertia switch like you said. It might also be the fuel pump drive module. I remember Homer or one of the other Ford techs saying that they replaced alot of those this winter. But before you get one let some other people post here. Here's a link: https://www.ford-trucks.com/forums/1...k-stumped.html

 

ok i had a chance to check the inertia switch and it's good

 

i had to find a picture of the fuel pump drive module to be sure but thats maybe what it is the one on my truck is cracked corroded and the plastic is seperated from the metal i going to have to replace it but is there a way to test this module?

 

KB3 CHECK POWER AND GROUND CIRCUITS TO THE FPDM
FPDM connector disconnected.
Key in ON position.
Measure the voltage between:

( + ) FPDM PWR Connector Harness Side and ( - ) FPDM Connector Harness Side GND

Is the voltage greater than 10.5 V?
Yes
For Ford GT, To check the FPM circuit,
GO to KB14 .
For all others, INSTALL a new FPDM.

No
GO to KB4 .

KB4 CHECK POWER TO FPDM
Key in ON position.
Measure the voltage between:

( + ) FPDM Connector PWR Harness Side and ( - ) Ground


Is the voltage greater than 10.5 V?
Yes
REPAIR the open circuit.

(Open FPDM ground circuit)

No
Key in OFF position.

No power to the FPDM

For F-150,

F-Super Duty,

Expedition, and

Navigator, GO to KB10 .

For all others, GO to KB5 .


KB10 CHECK THE FUEL PUMP FUSE
Note: These steps are for applications with FPDM PWR relay integral to the PDJB.

Check the FPDM power supply relay fuse. (located on the PDJB).
Is the fuse OK?
Yes
GO to KB11 .

no
INSTALL a new fuse.

CHECK the associated circuits for a short to ground before installing the fuse.

KB11 CHECK POWER TO IFS
IFS connector disconnected.
Key in ON position.
Measure the voltage between:

( + ) IFS Connector Harness Side FPDM PWR-A and ( - ) Ground



Is the voltage greater than 10.5 V?
Yes
Key in OFF position.

GO to KB13 .

No
Key in OFF position.

GO to KB12 .

KB12 CHECK THE FPDM PWR CIRCUIT FOR AN OPEN BETWEEN THE IFS AND PDJB
PDJB connector disconnected. (connector with FPDM PWR circuit)
Measure the resistance between:

( + ) IFS Connector Harness Side FPDMPWR-A and ( - ) PDJB Connector Harness Side FPDM PWR - Pin 3


Is the resistance less than 5 ohms?
Yes
CHECK the fuel pump fuse.

If OK, INSTALL a new FP RLY/PDJB.

No
REPAIR the open circuit.

KB13 CHECK THE IFS FOR AN OPEN
Measure the resistance between:

( + ) IFS Connector Component Side FPDMPWR-A and ( - ) IFS Connector Component Side FPDMPWR-B


Is the resistance less than 5 ohms?
Yes
REPAIR the open circuit.

(Open FPDM PWR circuit)

No
INSTALL a new IFS.

KB14 CHECK THE FPM CIRCUIT FOR AN OPEN IN THE HARNESS
FPDM connector disconnected.
PCM connector disconnected.
Measure the resistance between:

( + ) FPDM Connector, Harness Side FPM and ( - ) PCM Connector, Harness Side FPM



Is the resistance less than 5 ohms?
Yes
GO to KB15 .

No
REPAIR the open circuit.

KB15 CHECK THE FPM CIRCUIT FOR A SHORT TO POWER IN THE HARNESS
Key in ON position.
Measure the voltage between:

( + ) FPDM Connector, Harness Side and ( - ) Ground
FPM


Is the voltage less than 1 V?
Yes No
Key in OFF position.

GO to KB16 . REPAIR the short circuit.

KB16 CHECK THE FPM CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS
Measure the resistance between:

( + ) FPDM Connector, Harness Side FPM and ( - ) Ground



Is the resistance greater than 10K ohms?
Yes
GO to KB17 .

No
REPAIR the short circuit.

KB17 CHECK FOR FPM OUTPUT FROM THE FPDM
FPDM connector connected.
Key in ON position.
Note: It is OK for the voltage to cycle below this range and then return within range.

Measure the voltage between:

( + ) PCM Connector, Harness Side FPM and ( - ) Ground



Is the voltage between 0.02 V - 1 V?
Yes
INSTALL a new PCM. REFER to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM) .

No
INSTALL a new FPDM.


Hope any of this helps. If it turns out you need a new one check Tasca Parts they might have one cheaper than the dealership.

 

so i replaced the fpdm it now starts and runs for about 10 seconds then it dies i can shut key off and it will start again for anouther 10 seconds i'm going to check the pump presser there was one thing i noticed when i was starting it the gauges were like flutering almost like somthing was shorting any sugestions will be apreciated

thanks