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Old 12-01-2010, 07:47 PM
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2006 explorer, no fuel pressure ??

I know this isn't hotrodding, but i'm trying to help out a buddy.

He has a no start situation, the explorer cut out on the highway.

First, plugged in my scanner, no DTC's stored.

Next, I listened for fuel pump through the gas filler- it did sound like the pump kicked on. though this is something I have only listened for on chevy engines. I'm assuming the fords are similar; pump kicks on when the key is turned to on.

Next, I checked for spark. I have spark, but I have no idea if its in time.

Next I tried to get a fuel pressure reading. The only test port I could find
was on the drivers side attached to a diaphram looking component spliced into what looked like the main fuel lines. I used my gauge that I use on my chevys. It threaded on, so I'm assuming it works on the ford system as well. My gauge read zero fuel pressure.

This is a low mileage pretty new Ford. Please help Ford Guys!
Thanks
Brian

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Old 12-01-2010, 08:02 PM
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Sounds like you were hooked on to the evaporative line not the fuel line.
This will most likely be a non return style fuel system as well.
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Old 12-01-2010, 08:13 PM
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It also has a fuel pressure sensor/fuel temp sensor on the fuel rail that provides feedback to the PCM .There is also a fuel pump control module that ramps the fuel pressure up or down depending on operational conditions.
You can "T" into the supply line at the filter (before the filter to keep dirt out) with a gauge if you have the proper fittings and that way you can at least check the initial key on "prime system" pressure.
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Old 12-01-2010, 08:27 PM
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Quote:
Originally Posted by latech
Sounds like you were hooked on to the evaporative line not the fuel line.
This will most likely be a non return style fuel system as well.

The lines i threaded onto look like high pressure fuel lines, not evap, but
I don't know for sure. The dust cap was green, if that tells you anything.

I have a fuel line fitting for testing chevy TBI. It splices in between the send line and the TBI body, and has the threaded fitting to accept the a fuel gauge. Could I some how use it to T into the fuel line like you suggest?

Thanks!
You have answered many of my threads, thanks for the input!
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Old 12-01-2010, 09:31 PM
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There is a fuel pump shutoff switch that if I remember correctly will automatically go to off in the event of a collision or some such. Mine has triggered off once when I dropped the car too quickly when I released the car off of a floor jack. If I recall, the switch is located in the rear cargo area, driver side, behind the side panel. You might check to see if this switch has tripped off.
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Old 12-02-2010, 07:22 PM
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we did find a fuel reset behind the passenger side kick plate. Is there possibly another switch? My friend can't find his owners manual. I probably need to call Ford.
Thanks
Brian
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Old 12-03-2010, 12:52 PM
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You check the fuses and/or relays for the pump? Seem to recall there is a relay for the pump and/or EFI system located in an electrical box located in the engine compartment, the cover of the box has a diagram which should point you to it. I don't have access to my service manual - at my shop - I'll look next time I'm there.

The other item is have you checked for a clogged fuel filter - located along the driver's side frame rail.
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Old 12-03-2010, 03:12 PM
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Quote:
Originally Posted by briansansone
The lines i threaded onto look like high pressure fuel lines, not evap, but
I don't know for sure. The dust cap was green, if that tells you anything.

I have a fuel line fitting for testing chevy TBI. It splices in between the send line and the TBI body, and has the threaded fitting to accept the a fuel gauge. Could I some how use it to T into the fuel line like you suggest?

Thanks!
You have answered many of my threads, thanks for the input!
Yeah the green cap was for the evaporative system.
Can you hear the pump run?
Also the fittings are not like a chevy tbi. Look at the filter on the car and you will see what they are. The older style ford clip fittings will fit so you can rig up a "t" for your gauge but the fuel lines use the closed style on that year so you need the release tool to get them off of the filter to hook into the system. Remeber there is no return line, it is in the tank.
Also the fuel pump gets its power straight from the fuel pump control module. It sends power back to the pump on the pink/black wire and the other wire (ground) is black. Both come from the fuel pump control module so if you test the circuit for power use the ground for the circuit not a seperate one. I am not sure if the ground is the circuit that is modulated but I suspect it is. You can however verify power when first turning on the key for clarification given that the ground is the cicuit that is pulsed by the fuel pump module.

Last edited by latech; 12-03-2010 at 03:21 PM.
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