Ford 6.7L Power Stroke Diesel :: 2011 - Motor Backfire Through Intake - All Boost Lost
Aug 20, 2016
Under light acceleration without any load. The motor backfired through the intake. Lost all boost. Other than the backfire noise the motor seems to be fine except for lack of power due to no boost. The motor has been serviced by Ford Dealer since new. All services have been done at 5K mile intervals. The last service was done at 60K miles. All filters had been changed at that time (oil, air and fuel).
I do have experience with turbo/ supercharged motors. My experience would tell me that the problem was with a lean condition at the time of the backfire. Plenty of fuel in the tank and no low fuel pressure warning. I have seen low fuel pressure warning in the past but it happened during the winter when temps were negative 40 degrees. The truck is still under extended warranty so I really don't have concerns regarding repair costs.
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Truck = 2011 F250 150,000 miles, no modifications, stock.
Truck lost power yesterday, no boost, and no codes. When driving on Friday, I started moving from a red light. The truck seemed very sluggish. Then I noticed it downshift going up a small hill that it never downshifts before. I looked, and noticed the turbo gauge at 0, no boost. I pulled over, turned it off, then restarted it, but still no boost, and the truck is very under-powered. I looked over the area, and do not notice any leaks, also no leaks underneath. I hooked up my OBD reader, and no codes., the boost gauge is on zero, and the truck has lost significant power. I no longer hear the turbo spooling.
I have spent the past several hours searching sites and forums (Started with FTE ), and it seems that most believe a restart of the truck has solved it for them. However, this is not the case for me, a restart, even after letting it sit overnight did not resolve the issue.
I did see one reference that replacing a NOX sensor solved their problem. This brings up some interesting truck history. Back in June 2017, my truck threw the following codes, P207F and P20EE.
P207F - Reductant Quality Performance
P20EE - SCR NOx Catalyst Efficiency Below Threshold (Bank 1)
The message said I have 200 miles until reduced power. Since it was a Friday, not much I could do at the time so I let it sit overnight, and then the next morning the message was gone. I plugged in the OBD reader and cleared the only remaining code (P20EE), and its been a very happy truck until yesterday.
So my question, can a bad NOX sensor cause the issue of loss of turbo boost, with no codes? Is there another possible cause?
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Just wondering, what the max boost rating on a stock turbo, stock engine in a 2011 is. I know the gauge goes up to 40 PSI, but I don't think I've ever seen my go past 20.
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heard a loud squealing noise and now no boost. 2011 with 90k miles
whats my options and what would it cost.
1. replace with factory turbo
2. replace with upgraded turbo and tune?
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Currently truck is in the shop after having multiple episodes where it lost power. It has 47,000 miles on it. When pushing down gas pedal, just does not want to go. Very slow to shift through the gears and get to highway speed. Turbo was not there, and there was also a hard shift/jerking from 2nd - 3rd. Did notice the traction control sensor kick on a couple of times....which was just replaced since a hole rubbed through the wiring. (took it to Ford twice before they found the problem)
They told me today that the code generator said to look at wiring but they did not find anything (heard that before) and that the fuel is possibly contaminated with DEF. If that is the case, someone is messing with my truck! What I don't understand that if the DEF does turn out to be in the fuel tank, wouldn't we have the problem continuously and not intermittently over a month after driving thousands of miles and going through numerous tanks of fuel? We drive and average of 60 miles per day just for work, half interstate/city.
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We got "bad" gas in Feb, 2016, had to replace entire fuel system. Haven't driven the truck but 4000 miles. Last week, she started spitting and sputtering and lost power. We could see fuel pouring out. NO CEL. Towed (AAA has paid for itself several times over with this truck) to dealer that replaced the fuel system, still waiting to hear from them. Does this sound like it should be under the warranty for the work they did? We have averaged a huge repair bill about every 3-4 months on this truck, 2011 F250 Lariat, 8cyl, 6.7L, since we bought it 2 years ago.
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My tailgate emblem has lost the blue color. Is this a common problem? Is it easy to replace the emblem?
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Had my oil changed on my 2011 F350, and the tech said that I lost one gallon of antifreeze coolant. Where could the coolant have gone? We could not find a radiator or hose leak. I am afraid that the coolant somehow got into the engine oil, and may have damaged the engine. I have 46000 miles on the truck.
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Ok this may be the norm, but I'm hearing something like a motor running after i kill my engine? It sounds like a fuel pump or something!!! O ya I have a 2011 6.7. I've had the truck for several months but just now hearing this....
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I have a 2011 F350 6.7 cclb 4wd dually. 212k ... I have the dtc p0284. The run good at idle and driving. I use it to pull a 40ft enclosed trailer. I have noticed that the boost gauge peaks at the half way mark and slowly drops half way down. I can feel my truck lose power when that happens. I also noticed that it runs alot better at night than the day. I have not modified anything except a s&b cold air intake. I have the #8injector replaced.
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My truck threw a CEL after the first start today. The CTS reports it twice. I noticed it about two minutes after start.
P02E1 - Diesel Intake Air Flow Control Performance
The air box gauge is green and it doesn't reset when I push it so that appears to be fine.
The one thing I can easily notice is the sound of the turbo. Typically when I stop and park, the turbo spools up, then down, then spools again and gives a sigh of relief and it's then silent. It's not doing that currently.
Now, I can hear it constantly when parked and it spools down after I turn off the engine, even two minutes later. That is not normal for my truck when I wait for the above to finish its routine. When I start the truck, the turbo immediately spools to where I can hear it which is also not normal, as if it's building 0.5 psi. I realize that's funny to say on a turbo diesel but I know the sounds of my truck. The EGT's are fine, EOT, ECT, TFT are fine and I can build boost when driving without issue. I took the drive to work easy this morning so the highest I noticed was 10 psi.
I restarted the truck after a 20 minute drive to the office and it didn't clear the CEL. The CTS squawked four times when it woke up the second time but it didn't show me which PID it was upset about.
I'm thinking this has nothing to do with the CAI and this is something downstream of there. EGR related? I haven't opened the air box yet, at work and in dress clothes so that'll need to wait. My past four or five regenerations all started between 1.94 and 1.97 soot gpl. That is also not normal and is something I have been keeping my eyes on. Currently the DPF is at 2.10 so it has made it further. Normal behavior (post emissions flash) is above 2.54 soot gpl for an AR.
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my egr delete j pipe orings give me trouble and i replaced but broke a bolt, now i think that big donut oring is leaking, i was reading you can put a 3/4 freeze plug in to eliminate any coolant into the intake, where does the freeze plug go,front cover or intake and does coolant still pass thru the j pipe?
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Recently I have noticed my psi reading on my tuner hovers around .25 to .35 in the morning right when I start my truck. Normally it reads zero or is in the negatives. After driving around and stopping at red lights it will hover between .80 and 1.25. Now, I know that not a lot but its not what it normally reads.
Last week I went off road and my exhaust took a hit and loosened up and caused a small leak near the rear axle. I unbolted it and for the most part fixed the leak minus some alit air flow coming from the slits in the pipe. I'm not getting any codes and haven't noticed any decrease in performance. It does however seam to slow down quicker when I let off the throttle. I'm running an SCT X4 with dpf and erg delete and have a S&B CAI.
I called a performance exhaust shop and the tech said a small leak shouldn't cause any issue like that especially because its so far back. Another respectable vendor told me it might be that my vein are stick.
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after my DPF delete and fl0-pro 5" install, i've noticed a slight decrease in lower rpm boost. with the tune i have i can still get it wound up, but it takes a little "gettin on it" to get there. i miss the little bit of boost i had from stop lights and what not, or even cruising at 50 with a slight increase in fuel. i don't want to have to have it downshift in order to spool the turbo to get me that slight uptick in power.
i've heard differing opinions - "stock turbos need the 4" for more backpressure" ; "5 inches is great, b/c you could always use a couple extra inches" ; "there's no difference between the two, but you don't NEED a 5 inch until you're at 1k bhp".
i've got the 5" setup on there... that's that. how can i increase the reaction of the turbos? i've read about a wastegate adjustment (tightening), but not sure i'm ready to undertake that in the driveway, and i don't have access to a lift. nor am i sure this will correct my "issue." (i quoted it, b/c it's not really an issue, it's just a personal preference that i'm wanting to adjust to make myself a little more happy with the performance of the truck)
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I have a 2006 f350 4x4 dually 6.0. The other morning when leaving for work I hard a loud air noise, like a jet. It only happens when the motor is trying to create boost. I have NO boost. No smoke. If I push the fuel pedal past 1/4, nothing. Its like its stuck and no more power at all. I have changed the boot from the turbo to the intercooler pipe. (looked like it had cracks in it). Checked the cold pipe, no cracks seen. Check the exhaust clamps, into the turbo, they are tight. The turbo is seeping oil around the seal. I took the inlet, fresh air, pipe off. Check the turbo spool for looseness, fins, spun the wheel, ran the engine and watch to wheel. Seen no issues. Where to go now?? No coolant leaks, no oil leaks.
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I have an issue with my 6.0. I was running the extreme street tune from IDP for the past 2 years now and recently purchased the xtreme X tune from IDP. I loaded in the tune and had low boost, low power and horrible acceleration. Max boost i would see is about 10psi and it would take about a solid minute to reach highway speed when merging on the highway. I went back to the stock factory tune and have the same issue. No boost leaks from the boots or pipes and no check engine light. What is going on?
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I have an 03 6.0 Power stroke. My problem all started the other day when I started to occasionally not get any boost on acceleration and lose of power and a lot of vibration like it's about to cut out but it got worse now today I drove it about 5 miles into town when I got to town I noticed a rough idle I got gas in a gas can not in the truck. I got back in to leave and I had absolutely no power at all the truck stalled out and it was very hard to start finally got it started and it runs really rough almost like it's going to shut off.
So when I started driving I would only make it about a mile or so with out it chocking out and having to let it site for a minute or two and start it back up and go another mile or 2 and have it do the same thing all the way home all the time I have vary little boost if any at all except for when I first pull out now oil pressure is good and engine never over heated some of the codes I have is an EGR code and a contribution balance code for several cylinders I was thinking possibly a maf sensor or a clogged egr not working right.
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Having this problem, what to do to correct it? There is no hole in the boot and this just started about a year ago. Does not do it all the time.
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I was driving and went to accelerate quickly and had no power, checked the boost gauge and it had very low boost. Continued like this the rest of the drive, all gauges normal, no check engine light, not towing or hot. Got home then next time out it was back to normal.
Someting to be concerned about? Or just a computer hiccup. Truck is '13 with 66k.
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I've got an 05 EX 4x4 150k miles. Stock tune, EGR delete only ....
Driving along and everything was good plenty of boost no power issues. Got off the freeway and truck just stopped making boost. So I messed with it for a couple days. Cousin with a Mac scanner flaked on me so I was stuck using Edge gauge cluster and trying to trouble shoot.
NO CODES, No smoke, EGT's rise and truck seems like it is lean. Boost has fluctuated between 4psi to 11 psi. What should MAF be at idle?
ICP has been consistent with whatever boost levels were being made.
FICM 47.5
New MAP tube/nipple cleaned
New MAF
Clean Air filter
New fuel filters
VGT actuates
Accel ped in spec
Turbo spins free
New hot side CAC boots
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Where the air intake for the cabin air conditioning system is? The past several trucks I've owned had a cabin air filter which I replaced annually. They get filthy and I can see why this dirt should not get into the evaporator coil. It will reduce air flow and here in Texas we need all the air flow we can get (106 today). It shouldn't be too hard to improvise a filter to wrap over the intake (for a cheap fix).
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