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ImpalaWhile undergoing many facelifts in its history, the Impala has proved itself to both civilians and police forces as one of the most capable 4-door cars GM has ever offered. Currently moving towards its 10th generation the Impala is one of the longest lasting and popular models.
2013 Impala 3.6 L engine surging at idle 600 RPM to 1000 up and down up and down up and down. Replaced throttlebody, plugs, PCV, replaced mass airflow sensor. Thought maybe there was a vacuum leak so I’ve sprayed carburetor cleaner pretty much everywhere and hasn’t changed the thing. Back of the intake manifold there is a hose that when I disconnect. (Vacuum line that goes to the brake booster as well as Power Brake Booster Vacuum pump) the idle smooths out & quits surging. Obviously I need the vacuum for my power brakes I’m at a loss. Appreciate any help in advance. Once I clear the codes, the check engine light comes back on, and it shows P0102-00…mass Air Flow (MAF) Sensor Circuit Low Frequency
Surging engine, 2013 Impala 3.6l HELP!!
