No START!???!
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New User
Joined: Apr 2013
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From: northern california
No START!???!
2001 F250 7.3l turbo diesel. Motor acted like it ran out of fuel-and then no start. discovered oil reservoir in front of fuel filter was not full of oil, i attempted to fill it up and realized that the oil was going directly into oil pan. could this be the cause of engine not trying to start? and if so why would oil not stay in reservoir?
please help. At the same time i discovered the electric fuel pump on from under driver side does not come on when trying to start. I ran a jumper wire to run it and pressurize and get fuel to the filter. Checked all fuses several times-they are all good. Totally Baffled!!! Any ideas would be great! thanks~salena
please help. At the same time i discovered the electric fuel pump on from under driver side does not come on when trying to start. I ran a jumper wire to run it and pressurize and get fuel to the filter. Checked all fuses several times-they are all good. Totally Baffled!!! Any ideas would be great! thanks~salena
Posting Guru
Joined: Jun 2002
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From: Panama City, Fl
You must have oil pressure...High Pressure Oil Pump.....for the injectors to fire. This is different than engine oil pressure. Not sure why it would run back to the pan unless the high pressure pump is bad.
Veteran/Sheepdog
Joined: Feb 2012
Posts: 6,047
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From: Western AR
My good friend who worked on 7.3s at the dealership for a decade says that check valve in the bottom of the reservoir can fail. He said he's seen a few. They are a PITA to fix...
It is possible this could be your problem. I'm about to replace my fuel pump. It is tired and not keeping up pressure on hard acceleration.
It is possible this could be your problem. I'm about to replace my fuel pump. It is tired and not keeping up pressure on hard acceleration.
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New User
Joined: Apr 2013
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From: northern california
If i pull reservoir off will i find valve on the bottom?
Veteran/Sheepdog
Joined: Feb 2012
Posts: 6,047
Likes: 110
From: Western AR
If your check valve failed, it is part of the front cover. You need to pull the reservoir and HPOP to get at it. It is right next to the unserviceable plug on the bottom of the HPOP on driver's side. Very rare for it to fail, but it does happen.
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From: northern california
hope you dont mind if i pick your brain. the plug for IPR has one hot leg and assume the other is ground. is this ground controlled by PCM? I had an issue with glow plugs not working- found it was not getting ground at relay, so i put a momentary switch for ground to temp. correct that issue and now that works. Does the PCM control all of these grounds? and could this be my problem. If so, what would be the easiest way to check it?
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Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
Your 2001 does not have any check valve in the reservoir or front cover so don't bother looking for it. The anti drain back check ball (short circuit check ball) is in the block. It won't cause your engine to shut down. The HPOP reservoir has a stand pipe that drains to the pan...if you fill it up enougn, it will fill your pan. The oil level should be about 3/8" from the top so stop when you get to that point.
A faulty IPR (Injection Pressure Regulator) coil can cause the engine to shut down but it won't cause your fuel pump to shut down.
The PCM controls the fuel pump. Does your Wait To Start light come on? If not, then suspect bad power to the PCM. Do you have a chip. If WTS light works, then check for power at the pump as soon as you turn the key to run. You will have about 20 seconds to check for power until that circuit shuts off. If no power at the pump, then check your fuel cut off enertia switch located in the passenger front kick panel...there should be a hole in there to find and reset the switch.
A faulty IPR (Injection Pressure Regulator) coil can cause the engine to shut down but it won't cause your fuel pump to shut down.
The PCM controls the fuel pump. Does your Wait To Start light come on? If not, then suspect bad power to the PCM. Do you have a chip. If WTS light works, then check for power at the pump as soon as you turn the key to run. You will have about 20 seconds to check for power until that circuit shuts off. If no power at the pump, then check your fuel cut off enertia switch located in the passenger front kick panel...there should be a hole in there to find and reset the switch.
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
hope you dont mind if i pick your brain. the plug for IPR has one hot leg and assume the other is ground. is this ground controlled by PCM? I had an issue with glow plugs not working- found it was not getting ground at relay, so i put a momentary switch for ground to temp. correct that issue and now that works. Does the PCM control all of these grounds? and could this be my problem. If so, what would be the easiest way to check it?
Veteran/Sheepdog
Joined: Feb 2012
Posts: 6,047
Likes: 110
From: Western AR
This is what I was talking about, but obviously my terminology was wrong. Sorry about that...and thanks go to Greg for setting it straight.
Fleet Mechanic
Joined: Apr 2011
Posts: 1,441
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From: Marseilles IL
Try unplugging your fuel bowl heater and then checking all the fuses. Fuel bowl heater plug is on the back lower part of the fuel bowl. I was getting momentary shorts in mine. I would get stumbles in running for quite a while until the fuse finally blew and it also takes out the fuel pump, the fuel pump is on the same fuse. You don't really need the fuel bowl heater. Mine has been unplugged for 2 years. Good luck.
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
I will attach some tech sheets with that info...
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New User
Joined: Apr 2013
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From: northern california
At one time there was some sort of valve in the front cover but that design was revised prior to the '99 SD introduction. Same for the IPR drain routing. Even if the IPR hangs open, there is no way for the reservoir or HPOP oil to drain back to the pan. The early years may have had that issue but our trucks do not.
I will attach some tech sheets with that info...
I will attach some tech sheets with that info...
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
Because of glow plug relay not getting ground from PCM the fuel pump not working and the WTS light NOT coming on I'm convinced that its a bad PCM. I have checked all fuses and relays. Is there only one PCM (under driver side dash) there is a chip that has a selection screen that says the PCM is not responding. Or am I missing something? Now when I try to start the relays just click- no power to solenoid from ignition. (This is a new issue) every day it's something new even when I haven't touched it. Thanks~ Salena
Can you post a picture of this chip and display?