PawPaw

Last week light came on but truck was running fine. I took it to the dealer and they determined that one of the O2 sensor's was bad. They changed it out and said they had 3 suspect injectors and will change those out Monday. Feel's like the engine has a slight miss and a little sluggish even though I've been driving it every day. Maybe some cheap gas I put in it a few week's ago and then let the truck sit for a week while Wife and I went to Vegas. Right after that the problem began. Anyone else has had this problem because it's a first for me.

GRWolverineFan

I wouldn't worry about it, that is why you have a warranty. Your engine is massively overbuilt (future-proofed for DI and FI) and one bout of bad gas isn't going to ruin it.

PawPaw

Thank's for the reassurance! I'll give a report on what happened when I get the truck back.

01silverbullet

Too much fuel could have caused the O2 sensor to fail. Sounds like the Injectors could be the root cause.

So overall how to you like the 5.0?

PawPaw

Impressed with the mileage and mid range power, a little sluggish from 0-40 mph compared to my old 5.4 engine. I hope the injector's are the problem and they'll get it corrected.

GRWolverineFan

The 5.0 loves to rev, even with the redesigned intake manifold and cam tuning it isn't the best engine off idle. That said, it is bar none the best domestic V8 I have driven outside of the LS7. Flamesuit on: I prefer it to the 6.2, it revs just as hard but isn't nearly as peaky.

PawPaw

Wife picked up the truck for me Monday evening. They changed one O2 sensor and 3 injector's and truck ran fine untill Tuesday morning on my way to work when check engine light came on again. Truck not running too bad and no smoke coming out of tailpipe or smoke or flames from engine so I'll run it untill I can get it back into dealer for the 5th time. I have another dealer that is close to my work and will check them out if the dealer that I bought it from can't correct it. My 5th Ford truck and the first with this problem.

triglet

man that sucks. Hope they get it figured out. If not i'll still take it if you want to give it away

01silverbullet

From experience it is a good idea to change both right and left bank O2 sensors at the same time. If not they might not sync up together and cause the check engine light to come on. The only way to verify is to datalog the sensors and overlay the two recorded signals.

What kind of fuel milage are you seeing? Did it get worse with the issue?

Good Luck!

RiverRat5.0

I am sorry to hear your having problems. I came from a car that had many issues that you speak of....*cough (government motors)*