Search results

  1. 3

    po174 running too lean

    I have a 97 5.7 vortec 4l60e tranny z71 the problem I am having is this cel keeps coming on and off . I have already replaced all 4 o2 sensors , cleaned the maf sensor. and replaced my pcv valve and the elbow which was cracked. I did notice that when it was straight piped I never had this...
Top