6.0 fuel issue
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Junior User
Joined: Sep 2009
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6.0 fuel issue
Haven't been here in awhile but now have a f350 6.0 issue I need to attend to. I have a no start situation. Drove truck home one day and it wouldn't start the next day. Truck has 113K miles. No codes were showing. Thought it was an electrical issue because of all the rodents eating wires on the cars here. But I decided to pull the air cleaner and inject some starting fluid and it did temporally start. So, I opened the upper fuel filter and drained what little diesel fuel was in there. I then cycled the fuel pump 5 or 6 times just to get the fuel up to where I think it should be in the fuel filter container. I can hear the fuel pump working. Shouldn't one cycle of the key fill this filter container? Also, the fuel drains back into the supply line. Any ideas here? Maybe a weak fuel pump? Thanks
Posting Guru
Joined: Nov 2011
Posts: 1,664
Likes: 4
From: Southern AZ
Ok... couple of things... first... never use starting fluit on a newer diesel... Just asking for trouble/damage there.
Second... when you turn on the key the fuel bowl should fill. You can also check the lower fuel filters on the fuel pump module.
Make sure your batteries are well charges and dont try to crank if they aren't... you WILL kill your ficm doing that.
Until that fuel bowl fills when the key turns on dont try to start - trying to run the engine with low fuel pressure will destroy your injectors.
another thing to check... how much fuel yo you have. i'f you are around 1/4 tank, the pickup foot in the tank might have come off/apart so you are not getting fuel.
Hopefully one of the mods will tow this to the 6.0 section.
Richard
EDT: I assume you are in CO?
EDT2: only use motorcraft filters
Second... when you turn on the key the fuel bowl should fill. You can also check the lower fuel filters on the fuel pump module.
Make sure your batteries are well charges and dont try to crank if they aren't... you WILL kill your ficm doing that.
Until that fuel bowl fills when the key turns on dont try to start - trying to run the engine with low fuel pressure will destroy your injectors.
another thing to check... how much fuel yo you have. i'f you are around 1/4 tank, the pickup foot in the tank might have come off/apart so you are not getting fuel.
Hopefully one of the mods will tow this to the 6.0 section.
Richard
EDT: I assume you are in CO?
EDT2: only use motorcraft filters
Thread Starter
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Junior User
Joined: Sep 2009
Posts: 89
Likes: 0
fuel delivery problem
Ok... couple of things... first... never use starting fluit on a newer diesel... Just asking for trouble/damage there.
Second... when you turn on the key the fuel bowl should fill. You can also check the lower fuel filters on the fuel pump module.
Make sure your batteries are well charges and dont try to crank if they aren't... you WILL kill your ficm doing that.
Until that fuel bowl fills when the key turns on dont try to start - trying to run the engine with low fuel pressure will destroy your injectors.
another thing to check... how much fuel yo you have. i'f you are around 1/4 tank, the pickup foot in the tank might have come off/apart so you are not getting fuel.
Hopefully one of the mods will tow this to the 6.0 section.
Richard
EDT: I assume you are in CO?
EDT2: only use motorcraft filters
Second... when you turn on the key the fuel bowl should fill. You can also check the lower fuel filters on the fuel pump module.
Make sure your batteries are well charges and dont try to crank if they aren't... you WILL kill your ficm doing that.
Until that fuel bowl fills when the key turns on dont try to start - trying to run the engine with low fuel pressure will destroy your injectors.
another thing to check... how much fuel yo you have. i'f you are around 1/4 tank, the pickup foot in the tank might have come off/apart so you are not getting fuel.
Hopefully one of the mods will tow this to the 6.0 section.
Richard
EDT: I assume you are in CO?
EDT2: only use motorcraft filters
Fleet Mechanic
Joined: Nov 2016
Posts: 1,343
Likes: 94
You need to get an app to monitor engine parameters. High pressure oil psi, cranking rpm, ficm voltages and ipr and ficm sync at a minimum.
If any are outside accepted values, engine won’t start.
Post those numbers please, really helps the troubleshooting process.
If any are outside accepted values, engine won’t start.
Post those numbers please, really helps the troubleshooting process.
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Junior User
Joined: Sep 2009
Posts: 89
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I have a scan guage and have the following readings. FMP-47.5, ICP-1654, SYC-1, IPR-14.8--key on-not started and 46.4 cranking. and FLP 11.0,--10 when cranking. Seems like i'm in spec range so was thinking it was electrical. Checked all fuses and relays. Oil being pumped into oil filter. Just no fuel being pumped into upper fuel filter. I don't know if putting a pressure guage onto the fuel filter would tell me much. Thanks
Hotshot
Joined: Jul 2013
Posts: 14,266
Likes: 2,187
What weather temps are you seeing?
6.0 uses oil to operate the fuel injectors and you may have a case of stucktion.
switch to 5w40 for the winter and use an oil additive like opti lube engine oil additive.
6.0 uses oil to operate the fuel injectors and you may have a case of stucktion.
switch to 5w40 for the winter and use an oil additive like opti lube engine oil additive.
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Junior User
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6.0 fuel delivery
I'm running 5w40 now. the engine heater has been plugged in for the past few days while attempting to start. Will be working on it today while in the 60's. I'll have to look up stucktion. Thanks
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Thread Starter
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Junior User
Joined: Sep 2009
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6.0 fuel delivery
The ICP while cranking jumps to over 1600. I did earlier disconnect the ICP and still a no start. I will do the ICP voltage this morning and get back with you. Thanks
Hotshot
Joined: Jul 2013
Posts: 14,266
Likes: 2,187
Thread Starter
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Junior User
Joined: Sep 2009
Posts: 89
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6.0 fuel delivery
I programed the scan gauge for ICP voltage (ICV). With cable connected I have a key on reading of .23v. With cable connected and cranking I have a reading of 1.94v. With cable disconnected I have 0 volts both cranking and with key on and a no start. Hope this helps?
Posting Guru
Joined: Nov 2011
Posts: 1,664
Likes: 4
From: Southern AZ
Hey--I haven't purchased a can of starting fluid in 45 years because I know of the problems it can cause. After a week of trying to find a solution to this no start 6.0, a mechanic thought I should try a can. After I started this thread, I went and cycled the fuel pump 6 times for about 30 seconds each time. I thought this would make it start but it failed. I did open the filter canister and it was pretty full. There was also a little pressure in the canister. I had another fuel pump go out in our car with the same results--no start. I do have a dump bed on this truck so I could dig in the tank to see if the pick up tube has a problem. I'm wondering if maybe the pump got weak--if that's even possible. Can a guy check the pressure at the fuel filter at all to see if there is 45 psi just by cranking the engine? Thanks for your input. Yea--I'm in Colorado as you say. The fuel tank is 3/4 full.
DTR shows the options in this video:
here is a test port adapter...
Richard
EDT: nothing is jumping out at me on the numbers you gave. I would verify base fuel pressure and do a blue spring kit (if you haven't already)
EDT2: I have never heard of stiction causing a failure to start... Just drive-ability issues
Thread Starter
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Junior User
Joined: Sep 2009
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6.0 fuel delivery
You dont need to crank the engine to get fuel pressure. there is a test port you can hook a gauge to but there is no sensor...
DTR shows the options in this video: https://www.youtube.com/watch?v=wW2mqLL-3YY
here is a test port adapter... https://www.amazon.com/gp/product/B0...A3Q5L29ROA0I31
Richard
EDT: nothing is jumping out at me on the numbers you gave. I would verify base fuel pressure and do a blue spring kit (if you haven't already)
EDT2: I have never heard of stiction causing a failure to start... Just drive-ability issues
DTR shows the options in this video: https://www.youtube.com/watch?v=wW2mqLL-3YY
here is a test port adapter... https://www.amazon.com/gp/product/B0...A3Q5L29ROA0I31
Richard
EDT: nothing is jumping out at me on the numbers you gave. I would verify base fuel pressure and do a blue spring kit (if you haven't already)
EDT2: I have never heard of stiction causing a failure to start... Just drive-ability issues
Cargo Master
Joined: Jul 2005
Posts: 3,495
Likes: 7
From: Not as far west as I want
Couple things to look at. How old are the fuel filters? Also, are they Motorcraft filters?
Second: have you done the blue spring swap on the fuel regulator? It is a stronger than the factor spring increasing pressure. That helps with starting.
Third: is the fuel pump on the fame under the drivers side door working like it should?
What you're presenting sounds like fuel isn't getting to the injectors like they should. If it was a bad injector it would run with a miss.
Thread Starter
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Junior User
Joined: Sep 2009
Posts: 89
Likes: 0
6.0 fuel delivery
https://www.youtube.com/watch?v=WjF3u2w2gAg This covers the test procedure for fuel pressure.
Couple things to look at. How old are the fuel filters? Also, are they Motorcraft filters?
Second: have you done the blue spring swap on the fuel regulator? It is a stronger than the factor spring increasing pressure. That helps with starting.
Third: is the fuel pump on the fame under the drivers side door working like it should?
What you're presenting sounds like fuel isn't getting to the injectors like they should. If it was a bad injector it would run with a miss.
Couple things to look at. How old are the fuel filters? Also, are they Motorcraft filters?
Second: have you done the blue spring swap on the fuel regulator? It is a stronger than the factor spring increasing pressure. That helps with starting.
Third: is the fuel pump on the fame under the drivers side door working like it should?
What you're presenting sounds like fuel isn't getting to the injectors like they should. If it was a bad injector it would run with a miss.