Trouble after running low on fuel.
06-20-2018, 07:26 PM
#1
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Trouble after running low on fuel.
Hi all, first post, I’ve browsed but found nothing really matching my scenario, just looking for ideas on where to start with this so thanks in advance.
2006 5.4L SuperCrew 4x4 with 104,000 miles. Truck has been running perfectly, within last 6 months have had all plugs changed, pssanger side manifold, and full fuel system clean done by Ford dealer. Also replaced air and fuel filter.
So so while running late for a work meeting the other morning I ran it nearly dry on fuel, to the point of stumbling into the gas station after my meeting. On startup after filling the tank it was running rough at idle, on the drive home it still was running rough at low rpm, but seemed to clear up under load and at higher rpm. Nearly home the check engine came on, too it to Autozone for code read and came back with P0172, P0300, and P0301. I looked them up and found they are system too rich bank 1, misfire cylinder 1, and random misfire.
I put put in some Royale Purple fuel system cleaner thinking that running low on fuel maybe picked up some crud from the bottom of the tank and drove it for a short while. Starting up this morning it started hard (3-5 seconds), blackish smoke and strong fuel smell. Same rough idle seeming to clear under load.
Could a stuck open fuel injector cause this, or more than one? Is that likely the issue, crud from the bottom of the tank? What about a fuel pump problem, I’ve seen these returnless line models have fuel press regulated buy voltage to the pump, if the pump overheated could it be stuck on full pressure? I will have time for more diagnosis this weekend, but this is where I’m at now, looking for ideas from experience, thanks!
If there are mistakes blame my phone.
2006 5.4L SuperCrew 4x4 with 104,000 miles. Truck has been running perfectly, within last 6 months have had all plugs changed, pssanger side manifold, and full fuel system clean done by Ford dealer. Also replaced air and fuel filter.
So so while running late for a work meeting the other morning I ran it nearly dry on fuel, to the point of stumbling into the gas station after my meeting. On startup after filling the tank it was running rough at idle, on the drive home it still was running rough at low rpm, but seemed to clear up under load and at higher rpm. Nearly home the check engine came on, too it to Autozone for code read and came back with P0172, P0300, and P0301. I looked them up and found they are system too rich bank 1, misfire cylinder 1, and random misfire.
I put put in some Royale Purple fuel system cleaner thinking that running low on fuel maybe picked up some crud from the bottom of the tank and drove it for a short while. Starting up this morning it started hard (3-5 seconds), blackish smoke and strong fuel smell. Same rough idle seeming to clear under load.
Could a stuck open fuel injector cause this, or more than one? Is that likely the issue, crud from the bottom of the tank? What about a fuel pump problem, I’ve seen these returnless line models have fuel press regulated buy voltage to the pump, if the pump overheated could it be stuck on full pressure? I will have time for more diagnosis this weekend, but this is where I’m at now, looking for ideas from experience, thanks!
If there are mistakes blame my phone.
06-20-2018, 08:40 PM
#2
Hi all, first post, I’ve browsed but found nothing really matching my scenario, just looking for ideas on where to start with this so thanks in advance.
2006 5.4L SuperCrew 4x4 with 104,000 miles. Truck has been running perfectly, within last 6 months have had all plugs changed, pssanger side manifold, and full fuel system clean done by Ford dealer. Also replaced air and fuel filter.
So so while running late for a work meeting the other morning I ran it nearly dry on fuel, to the point of stumbling into the gas station after my meeting. On startup after filling the tank it was running rough at idle, on the drive home it still was running rough at low rpm, but seemed to clear up under load and at higher rpm. Nearly home the check engine came on, too it to Autozone for code read and came back with P0172, P0300, and P0301. I looked them up and found they are system too rich bank 1, misfire cylinder 1, and random misfire.
I put put in some Royale Purple fuel system cleaner thinking that running low on fuel maybe picked up some crud from the bottom of the tank and drove it for a short while. Starting up this morning it started hard (3-5 seconds), blackish smoke and strong fuel smell. Same rough idle seeming to clear under load.
Could a stuck open fuel injector cause this, or more than one? Is that likely the issue, crud from the bottom of the tank? What about a fuel pump problem, I’ve seen these returnless line models have fuel press regulated buy voltage to the pump, if the pump overheated could it be stuck on full pressure? I will have time for more diagnosis this weekend, but this is where I’m at now, looking for ideas from experience, thanks!
If there are mistakes blame my phone.
2006 5.4L SuperCrew 4x4 with 104,000 miles. Truck has been running perfectly, within last 6 months have had all plugs changed, pssanger side manifold, and full fuel system clean done by Ford dealer. Also replaced air and fuel filter.
So so while running late for a work meeting the other morning I ran it nearly dry on fuel, to the point of stumbling into the gas station after my meeting. On startup after filling the tank it was running rough at idle, on the drive home it still was running rough at low rpm, but seemed to clear up under load and at higher rpm. Nearly home the check engine came on, too it to Autozone for code read and came back with P0172, P0300, and P0301. I looked them up and found they are system too rich bank 1, misfire cylinder 1, and random misfire.
I put put in some Royale Purple fuel system cleaner thinking that running low on fuel maybe picked up some crud from the bottom of the tank and drove it for a short while. Starting up this morning it started hard (3-5 seconds), blackish smoke and strong fuel smell. Same rough idle seeming to clear under load.
Could a stuck open fuel injector cause this, or more than one? Is that likely the issue, crud from the bottom of the tank? What about a fuel pump problem, I’ve seen these returnless line models have fuel press regulated buy voltage to the pump, if the pump overheated could it be stuck on full pressure? I will have time for more diagnosis this weekend, but this is where I’m at now, looking for ideas from experience, thanks!
If there are mistakes blame my phone.
06-20-2018, 10:27 PM
#3
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06-21-2018, 06:16 AM
#5
Mark
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Pull #1 plug and take a look... have another ready to replace it.
06-21-2018, 03:16 PM
#6
That's like the doctor telling you your x ray shows a broken leg and you say but I was eating an orange when it happened. It may be related to the low fuel or not. It really doesn't matter at this point. Number 1 is one of the most accessible plugs/coils. your code tells you there is an issue with it. At least look at it or replace it as suggested. You are also assuming the tank has crud in it. Most don't and even when low you still have a gallon or 2 in there. good luck
06-21-2018, 03:19 PM
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06-21-2018, 06:40 PM
#8
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That's like the doctor telling you your x ray shows a broken leg and you say but I was eating an orange when it happened. It may be related to the low fuel or not. It really doesn't matter at this point. Number 1 is one of the most accessible plugs/coils. your code tells you there is an issue with it. At least look at it or replace it as suggested. You are also assuming the tank has crud in it. Most don't and even when low you still have a gallon or 2 in there. good luck
06-21-2018, 09:38 PM
#9
I see that logic, I just have a feeling it has to be related, it was running perfectly and this started literally as it was running out of fuel. The reserve was spent, I have a 26 gallon tank and when I fueled up after pulling in stuttering on fumes it took 25.8 gallons until the pump clicked off. I haven’t had time to dig further, I will certainly check cylinder 1, but it also seems like it is getting way too much fuel for it to be just one faulty plug...it wreaks of fuel and has gone through almost 1/4 tank of fuel in only 38 miles....when I saw that I’m stopping even the short drive to work until I have time to figure this out
06-22-2018, 10:31 AM
#10
Check/replace any worn plugs. While you're at it, get a bottle of Redline SI-1 fuel system cleaner and run a tank of that to remove the possibility of a sticky injector. Before you actually start the truck, do you hear the fuel pump priming normally? Running low on fuel can burn up pumps, since the gas cools and also lubes the pump.