I hope someone on here can help me.
The 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.
