My brother-in-law bought a 2014 Fiesta 3cyl 1.0 EcoBoost in good shape but it loses power when the accelerator is pressed more than a quarter of an inch. So far he has replaced the crank sensor, the high pressure fuel pump ,MAF ,air filter, plugs, newTurbo, and it still does it. He has offered it to me cheaply if I can fix it because he is tired of it. The turbo was installed at the dealer as well as the high pressure fuel pump I think. Any suggestions or even methods of testing or recommendations to try the dealer again are appreciated.
it starts and drives very well so long as you are on level or downhill and you don't exceed a quarter inch on the throttle. As soon as you approach an incline the power just isn't there and you must go back down to second gear and drive around 20 miles per hour with the throttle barely depressed. On a slight downhill you can work your way all the way through five speeds and up to 80+ mph easily so long as you don't press the throttle more than those few millimeters. Once you exceed that quarter inch it is almost like releasing the throttle pedal. I have driven it about a hundred miles and the only code it has ever thrown was the PO 340 and 365 for the cam position sensors and I replaced both of those. It runs perhaps slightly better but still has the same throttle issue.
I have very little turbo knowledge but a good general knowledge of auto mechanics. The car has 120,000 miles. I am considering purchasing a $500 scan tool, would this be worthwhile if there are no real codes? If so, what parameters on a real-time scan tool might tell me my issue? So far I'm looking at the xtool D7 scanner. Any help is appreciated:-)

 

It is better if you post the data stream info to be examined..

We look for what is out of spec under certain conditions.

Almost impossible, sending you on a wild goose chase speculating just doesn't work..

 

So, I take this to mean that I should buy a scan tool like the D7 xtool and plug that in and record the car doing its thing while I'm driving and then study the data streams. Which particular data streams do you recommend pulling up the graphs of for the recording? I think the D7 allows eight graphs at a time on screen.

 

If you post the data stream info, I will be glad to offer my opinion.

Until then speculation isn't worth much.