Coming up with these codes:
P0172 (x2) - Bank 1 system too Rich (two injectors failing on front bank), P1257 - Boost control fault system overboost.
We replaced the two injectors but the system is still running too rich. Question: What is causing injectors to run too rich still?
Additional information: Already had car in a local top tier shop they replaced the MAF and the O2 sensor, the TPS was also replaced. The car runs worse now than before, the gas peddle feels like mush now, before it was firm and very responsive with the old MAF sensor. The car idles better but has no pickup and falls on its face as soon as the speedo hits 50 MPH. If you try to speed up the engine while in park as soon as the tach hits 4000 the engine drops to 3500 then back to 4000 will not go above 4000 rpm. Checked tail pipe very black and a lot of carbon on the driveway under the tail pipe when you rev the engine. Did the paper over the tail pipe to make sure it wasn’t sucking back in (sign of valve problems?) constant pressure and good flow. I wonder if it has the wrong MAF sensor now and if the ECU is the right one for the car?