Oh, forgot to mention I have also replaced the fuel pump and the codes I'm getting are p2196 & p2198 for o2 sensors detecting rich condition.
2011 Ford Fusion Sport with the 3.5 V6 smokes and runs horrible
I hope someone on here can help me.
I have a 2011 Ford Fusion Sport with the 3.5 V6 smokes and runs horrible.
I'm pretty sure the problem is too much fuel being sent to the engine, but I can't figure out what the cause is. I've replaced a bunch of parts so far and nothing has worked.
Parts replaced so far:
1) All (4) o2 sensors - pre & post.
2) All (6) fuel injectors.
3) All (6) spark plugs.
4) All (6) coil packs.
5) The throttle body.
Looking around the internet I see people working on various cars with other parts that can cause the issue I have, but either this car does not have those parts or I cannot find on the car. These would include things like a fuel rail pressure sensor, Fuel pressure regulator, and several similar parts I can't remember. Please help if at all possible. I took this to a shop and they told me it was the (2) pre o2 sensors & wanted $1200 to change them. I told them no thanks paid $150 for their inaccurate diagnosis and changed all (4) o2 sensors myself. Did not help unfortunately. I'm usually pretty good with GM cars and have fixed many other imports, but this Ford has me stumped. I bought it used and it ran fine for a few months until this started happening. Any help is appreciated.
I have a 2011 Ford Fusion Sport with the 3.5 V6 smokes and runs horrible.
I'm pretty sure the problem is too much fuel being sent to the engine, but I can't figure out what the cause is. I've replaced a bunch of parts so far and nothing has worked.
Parts replaced so far:
1) All (4) o2 sensors - pre & post.
2) All (6) fuel injectors.
3) All (6) spark plugs.
4) All (6) coil packs.
5) The throttle body.
Looking around the internet I see people working on various cars with other parts that can cause the issue I have, but either this car does not have those parts or I cannot find on the car. These would include things like a fuel rail pressure sensor, Fuel pressure regulator, and several similar parts I can't remember. Please help if at all possible. I took this to a shop and they told me it was the (2) pre o2 sensors & wanted $1200 to change them. I told them no thanks paid $150 for their inaccurate diagnosis and changed all (4) o2 sensors myself. Did not help unfortunately. I'm usually pretty good with GM cars and have fixed many other imports, but this Ford has me stumped. I bought it used and it ran fine for a few months until this started happening. Any help is appreciated.
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Hi @dan.price.1967 I don't know enough to answer your question, but others more knowledgable than me may find useful your answers to these two questions: 1) What color is the smoke? 2) When does it smoke, all the time, just under throttle, or...?
Also, just an fyi, this forum covers the Sport with the 2.7 V6 twin turbo. I think there's at least one other Fusion forum that covers your 3.5 V6 Fusion.
Also, just an fyi, this forum covers the Sport with the 2.7 V6 twin turbo. I think there's at least one other Fusion forum that covers your 3.5 V6 Fusion.
I was not aware they made a 2.7 v6 turbo. To answer your question, it's black smoke & any time the car is running. I can see left over fuel dripping from the exhaust. I also see no evidence of the oil & water mixing like it does with a blown head gasket. If anyone knows if/where there is a fuel regulator on this 3.5 V6 version, please let me know where it is located. I have searched & searched the car & the internet and find plenty of detail on the other motors, but nothing on this one.
That car should be a returnless fuel system so no regulator, they very the voltage at the tank pump. Other wise know as duty cylce. There is a black box that's the fuel pump driver, I dont remember where it's at on the older body, but I'm sure there is someone on here that will. Far as raw fuel dripping out of the exhaust, that's highly unlikely. What your seeing is condensation from the exhaust system, the black smoke would indicate a rich issue with fueling. How old are the o2 sensors, some data logs would be helpful. Far as the 2017 up Sport goers, yes it has a 2.7 twin turbo, same engine in the trucks and some of the SUV's out there. They make two versions of the Nano motor, the 2.7 and a 3.0, on top of having one for FWD and RWD applications.
O2 sensors are all brand new. I just replaced them. I wonder if the "black box" you refer to is the charcoal canister box shown in the video below. Could this being bad possibly make my car run rich? Thanks for the help.
Hi dan.price. Are you sure it is "fuel" dripping from the exhaust and not water/condensation? Let's hope it is water.condensation.I was not aware they made a 2.7 v6 turbo. To answer your question, it's black smoke & any time the car is running. I can see left over fuel dripping from the exhaust. I also see no evidence of the oil & water mixing like it does with a blown head gasket. If anyone knows if/where there is a fuel regulator on this 3.5 V6 version, please let me know where it is located. I have searched & searched the car & the internet and find plenty of detail on the other motors, but nothing on this one.
Internet diagnosis for problems like this is iffy at best. However, if you have "...left over fuel dripping from the exhaust" you have a very dangerous situation and I would recommend you do not drive your Fusion until this issue can be fixed.
In addition to being dangerous, raw fuel being dumped into the catalytic converters will damage them in short order. So if this is actually fuel and not water, continuing to drive the vehicle will lead to an even larger repair bill, if the cats become damaged.
I am sure others will jump in to help and offer more advice
Let us know ow you make out and good luck.
Yeah, Skylinedan 1 mentioned that as well. I'll crank it up tonight just long enough to catch the liquid in a cup. Then I will turn the car off, take the cup to the street and see if a little of the liquid lights on fire easily - safely of course. Hopefully y'all are correct & it is water condensation. I always do my own work on basically everything, so there will be no repair bills other than parts.
Hi dan.price. Just letting you know that if it is raw fuel (unlikely) and you continue to drive it, it will damage your catalytic converters. And very quickly. Catalytic converters are expensive. So it will be a large repair bill for parts, whether you do the work or not.Yeah, Skylinedan 1 mentioned that as well. I'll crank it up tonight just long enough to catch the liquid in a cup. Then I will turn the car off, take the cup to the street and see if a little of the liquid lights on fire easily - safely of course. Hopefully y'all are correct & it is water condensation. I always do my own work on basically everything, so there will be no repair bills other than parts.
Let's hope it is not. Keep us updated and good luck. 🍻
Absolutely and I appreciate your help & concern. Cats are quite pricey & in this car a PITA.
The valve in the on the charcoal canister is a Vent valve, the one under the hood on the engine is the purge valve. I have heard of vent valves sticking and causing the canister to fill up with gas, never heard how that happens though. Mass air flow sensor could be bad too, the older N/A motors used mass air flow to control fueling.
I agree, maybe the MAF Sensor. That would help explain a rich mix. Also, you could have bad rings on the cylinders, allowing for oil to enter the combustion chamber. Have you checked your oil level? Might also check the PCV Valve. If it is clogged or not working, the back pressure build up could force oil into the cylinders. As @bbf2530 stated, internet diagnosis is really hard.
I was gonna add that, rings, and PCV. Definitely check your oil and keep an eye on it, oh and I didn't see anything about the milage on the car.
Just over 140k miles on the car & oil level is fine. I check the oil in all of my cars every time I fill up with gas. (I drive a caddy with a Northstar, and they leak oil constantly, so I got in the habit of every fill up gets an oil check.) This problem just came up over a period of a few weeks when we were driving the car. I don't drive it now, but I need to get it fixed so I can. That's why I don't think it's an issue with rings or burning oil because those issues would probably not make the car run as bad as it is all of a sudden. It was running fine before this issue started. It's never run hot since I've had it, so that's why I'm not really concerned of a head gasket type issue + no chocolate milkshake oil. From all the info I can find, this car does not have a purge valve. If it does, it's buried somewhere and I can't find any info showing where it is located with this 3.5 V6 motor. I've followed the fuel lines from injectors down to where they go under the car and see nothing that looks like the purge valve on the other motors they put in this car. I didn't get a chance to check the liquid from the exhaust last night, but I will this weekend. The MAF did not seem dirty when I checked it, but I might just replace it anyways in case its the electronics inside it. I will also check and maybe replace the PCV. Those are 2 good ideas of places to check. I really appreciate all the ideas and help. I agree that a proper diagnosis over the internet is very difficult. At this point, any part that I can replace for relatively cheap will get replaced if I think it could be the problem or even part of the problem. When I do eventually find the culprit, I'll be sure to put that info on this thread for people who are dealing with the same issue in the future.
Have you done a compression test yet , just skimmed thru the posts ?
I have not. I don't see how lack of compression would have to do with my rich situation though. (codes p2196 & p2198)
You have changed the O2 Sensors, but have you traced the wires for those sensors to see if they are possibly damaged?
The wiring did not appear to have any issues looking at them (visual inspection), but I think I will go back and double check them. It does not make sense to me that multiple wires could be damaged all at once, IE both banks, but I guess it is possible. MY27FUSION thanks for the manual page. That is very helpful. Here are the 4 codes that showed up. These appear to be the same codes, 2 of each. 1 & 3 look to be the same thing & 2 & 4 look to match as well. It doesn't make sense to me that the car is storing them as 4 separate issues, but that's what it's doing. (top right on the OBD2 reader 1/4, 2/4, etc.) Again, I really appreciate all the help and ideas from everyone!
![Product Communication Device Finger Gadget Gesture]()
Interesting read, even though it's not a TT
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