What could be the reason I'm losing power

[Brenden Elliott]

So about a month ago I had a bad 02 sensor that shut off my turbos for what I was told was a "safety mode" well I replaced the O2 sensor and it took about half a day of driving and my turbos kicked back on it felt like it was making great power I took it home and everything was fine then I drove it for about 20 minutes the next day and I again had no power.

Now it's been about a month and it has probably about half the power that it should have if I were to put it to the floor it shifts at 6,000 RPMs and I dont hear or feel the turbos till about 5,000

What could be the problem?

I dont see any obvious boost leaks and I dont drive it too hard and I'm pretty on top of maintenance

The only other thing I've noticed is my passer side hose is soaked with a little bit of oil and if i took the hose off there was some in the throttle body could that be a problem

 

[krewat]

Oil in the intake is a problem, because it'll coat the MAP sensors, and then the computer has no idea how much air is coming into the engine.

Also, I think there is a "boost reference" hose that likes to pop off... someone else here will tell you all about it

 

[FiveLeeter918]

Are you tuned? Datalogging and reviewing with your tuner is the best scenario. Definitely sounds like you have a wastegate control issue or the car isn't going to OP mode for some reason.

However, short of just double checking every hose and line in the system or pressure testing the system between the turbos and the throttle body there isn't much that you can do without datalogging that won't just waste your time.

 

[luigisho]

Oil in the intake is a problem, because it'll coat the MAP sensors, and then the computer has no idea how much air is coming into the engine.

Also, I think there is a "boost reference" hose that likes to pop off... someone else here will tell you all about it

Check this type of stuff. Oil on the hose is a good clue to chase.
Tuner info good as posted above.
If you don't have a tuner and can't locate it yourself take it to a mechanic or dealer tech who can hook up a diagnostic computer to examine all the systems not just a code reader. The new fancy equip is an expensive diagnostic tool and you'll have to pay, but you can chase your tail if the obvious stuff doesn't work.

 

[krewat]

And BTW, I didn't mean that an Ecoboost shouldn't develop oil in the intake tubing, especially from the PCV.

It's normal... and really, every oil change, clean those MAP sensors...

 

[FiveLeeter918]

And BTW, I didn't mean that an Ecoboost shouldn't develop oil in the intake tubing, especially from the PCV.

It's normal... and really, every oil change, clean those MAP sensors...

make sure you put normal in quotes haha... only Ford says it's "normal"

 

[krewat]

make sure you put normal in quotes haha... only Ford says it's "normal"

Well, ok