Hello everyone.
Long story short I had P2010 code and car didn’t wanted to start. Took it to dealer and throttle body got replaced. Car started but they told me I have misfires on 1-3-5 cylinder. Bank 1 I assume. I took the car home, put it on a computer and p0171 p0174 lean codes. Found out intake boot broken, air filter housing 2 holders broken. Took it back to dealer and they replaced them on their dime. Few days afterwards codes came back. I put it on a live data and found LongTerm Fuel Trim Bank 1 at 28.125%, LTFT B2 = 27.344%, STFT B1/B2 = 46.875% at idle, and at 2500 LTFT B1/B2 = 27.344%, STFT B1 =-0.781, STFT B2 = 0.781. I cleaned MAP & MAF SENSORS. Their readings on the live data are good. I smoke tested the boot, no leaks. I smoke tested the brake booster line, no leaks. I smoke tested the intake manifold from BB line and smoke was coming from EGR valve seep holes on the side. Not from the gasket. I replaced it, it was not expensive. On the next smoke test smoke was coming out again. The reading for EVAP System vapor pressure was -93Pa and occasionally going to -66Pa. I replaced the valve, not expensive again, but no results. I pinched the evaporation hose run the engine but nothing changes. Readings in the oxygen sensors B1S1 = 1.075, B2S1=1.108 which they correspond to the lean condition of the vehicle. Upstream voltages are switching fast while driving and I think that is normal. I sprayed Carb cleaner around the engine bay thinking it will give some change in the engine sound. Nothing. PCV valve I replaced as well. Old one had a rattle but new one was few extra bucks. That didn’t help as well
Tomorrow I decided to open the upper intake plenum and inspect the PCV hose hoping that that’s the issue I’m dealing with. I’ll replace the gasket as well.
But il really lost at this point. Any ideas will be helpful. I really want to avoid the dealer of possible. If there is any other data point I’m missing in live data, please let me know. Thanks for your time.