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Take a picture of you fuel rail showing Fuel Pressure Regulator OR Fuel Pressure Sensor and post this photo. We need to know what system you truck is equipped with.
all I see is sensor on drivers side rail. here are pics. If need more let me know
Last edited by Boston 04 F150; 06-21-2024 at 02:52 PM.
Tried this above few times, no change. I’ve noticed recently that with engine hot and not sitting to long, it has to crank less (still more than normal just not as bad)
I did a search for “fuel pressure” in manual, there is nothing about regulator only sensor
Some details about sensors..How do I check that sensor is bad?
have you monitored your fuel pressure, what was it when key turned to on ( not yet started)?
Ok so you have - Fuel Pressure sensor A returnless-type fuel system is one that is designed to use the powertrain control module (PCM) to regulate fuel delivery. A fuel pressure sensor mounted to the supply rail of the fuel injectors allows the powertrain control module to keep an eye on the fuel pressure. Your photo confirms that you have this system
The most common problem with fuel system on 2004 thru 2008 F150 is the Fuel Pump Driver Module (FPDM) which you replaced 3 years ago. NEXT - I would check the ground wire connection on the FPDM and make sure it is clean and tight.
As Laterongc stated, we will need to get some fuel pressure readings if the ground is not the problem
Ok so you have - Fuel Pressure sensor A returnless-type fuel system is one that is designed to use the powertrain control module (PCM) to regulate fuel delivery. A fuel pressure sensor mounted to the supply rail of the fuel injectors allows the powertrain control module to keep an eye on the fuel pressure. Your photo confirms that you have this system
The most common problem with fuel system on 2004 thru 2008 F150 is the Fuel Pump Driver Module (FPDM) which you replaced 3 years ago. NEXT - I would check the ground wire connection on the FPDM and make sure it is clean and tight.
As Laterongc stated, we will need to get some fuel pressure readings if the ground is not the problem
ok I will check the ground for FPDM. I took a few pics of fuel related readings
ok I will check the ground for FPDM. I took a few pics of fuel related readings
Doesn’t look like you have a fuel pressure problem. But since your issue was long crank hard start, I’d want to see what your pressure is when you first get to trick (after it’s say a bit) at:
Key on engine off (right before you start it)
and then watch what it does while cranking.
in other words, what is it while your symptoms are present.
Doesn’t look like you have a fuel pressure problem. But since your issue was long crank hard start, I’d want to see what your pressure is when you first get to trick (after it’s say a bit) at:
Key on engine off (right before you start it)
and then watch what it does while cranking.
in other words, what is it while your symptoms are present.
Longer video was taken after truck sat for 3hrs or so was driven this morning. Shorter video was taken right after the first.. Couldn’t get videos to upload here, but here are links:
The first longer video it looks like fuel pressure is lower - 20s instead of 30 in second video. If you listen to audio can hear it start. And this isn’t taking that long because was driven earlier
Last edited by Boston 04 F150; 06-23-2024 at 03:05 PM.
06-21-2024, 02:29 PM
