14 explorer 3.5 ecoboost p0171 and p0174

Hello all, i have a 2014 explorer ecoboost 3.5 with both banks running lean at about 30 percent per bank fuel trims. I smoke tested the intake system and its leaking where the pipe connects to the front turbo inlet, considering this is a MAP based system could this cause my problems? Also under light acceleration it seems to kind of buck and hesitate but under harder acceleration it runs good. Fuel pressures look good too fyi

Sorry for not getting back to you sooner, nathan.

My first instinct is restricted fuel injectors, especially because you noted how it bucks/hesitates under light acceleration. But there's a few more checks you can do first.

How's fuel quality? Ethanol content?

Since this is a MAP system like you noted, I'd want to see the MAP sensor and the Turbocharger Boost Pressure Sensor agree about barometric pressure, key on engine off.

Any significant misfire counts in Mode $06? I'm sure there'll be some counts, mostly just wanting to see if some cylinders are worse than others.

You can try to run the Relative Injector Flow Test if you want? But I'd take the results with some salt. Most of these automated direct injected tests struggle to positively ID an injector problem - especially if the majority of the injectors are similarly restricted.

Okay, so the customer wanted the car back before I could finish fixing this problem, to be fair I had it for a week waiting for new turbos to arrive. I guess my biggest question here is can a leak before the throttle body on a turbocharged speed density engine cause any fuel trim change? I tried adding alternative fuel in the area and it didnt change the trims at all. I wish I had more time with it but I started wondering if the weird light throttle surge feeling could have been a torque converter failing to lock up. Thanks for responding

Edit: I did run the injector balance test and they all had the exact same result, I think it said something like 160 on each injector, not sure what that number really indicates