fuel pump runs for 15 seconds after key turned on, noise under the hood by left batt
#1
fuel pump runs for 15 seconds after key turned on, noise under the hood by left batt
Just bought the truck a month ago. A friend of mine test drove the truck but decided not to buy it. It left him on the road. The owner came and got him, relieved the fuel off the filter for just a second and the truck started. I don't think that helped any because the truck has died on me a couple times on the road. If you let it sit for 30 minutes to an hour it will start back up. When you turn the key on, about 3 seconds later there is something making a hum kind of noise beside the left battery. Right now when the truck is cold and you turn the key on the fuel pump will run for about 13-15 seconds before it turns off. The truck will start, it just takes about 1-2 seconds longer to start then it should. I have changed the cam sensor, checked the oil level in the hpop, changed fuel filter, I changed the motor oil right after I bought it.
Is the fuel pump getting weak or the fuel regulator maybe causing this???
Is the fuel pump getting weak or the fuel regulator maybe causing this???
#3
Welcome to FTE.
Since you've already changed the CPS, I am now suspicious of the system that controls the HPOP pressure.
The sensor on the head, if you unplug it, is it oily inside?
Also a sticky IPR (injection pressure regulator) on the bottom rear of the HPOP could be the cause of the symptoms you describe.
Since you've already changed the CPS, I am now suspicious of the system that controls the HPOP pressure.
The sensor on the head, if you unplug it, is it oily inside?
Also a sticky IPR (injection pressure regulator) on the bottom rear of the HPOP could be the cause of the symptoms you describe.
#4
I pulled the plug in the top of the hpop and it has oil up to about 1" from the top. I have an uncle with a 7.3 and his would run but would not restart, it was a sensor on the hpop but don't know for sure which one it is. I have not checked it for codes, but don't remember seeing a check engine after the truck shut off going down the road. It shut off like you turned off the key.
#5
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#7
If there is oil in the sensor then the sensor is bad from what I remember...
I think this is the part number from Ford: F6TZ9F838A
www.ftepartsguy.com has them for like 125 or so.
I think this is the part number from Ford: F6TZ9F838A
www.ftepartsguy.com has them for like 125 or so.
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Thanks for all the help. no oil at the electrical connection on the head sensor.
Yes if you let it sit for 30 minutes or more it will restart.
I believe from what I hear it is definately the ipr sensor. Can it be seen at all with the fuel bowl still in place. I have looked for it but can't seem to see it. Just the fuel heater plug and the one beside it is the fuel regulator I do believe.
Yes if you let it sit for 30 minutes or more it will restart.
I believe from what I hear it is definately the ipr sensor. Can it be seen at all with the fuel bowl still in place. I have looked for it but can't seem to see it. Just the fuel heater plug and the one beside it is the fuel regulator I do believe.
#12
#13
Oh, forgot to mention.... the fuel pump running for 15 seconds with the key on is perfectly normal. It won't stay running until you start the engine.
#14
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