Quote:
Originally Posted by Jeremy556
So, you knew you had a bad cat a long time ago, decided to do a mod to ignore that fact, then when you undid the mod your mileage got worse? Did you do anything to diagnose the problem that caused the clogged cat in the mean time?
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I did not undo the mod. My fear is that the VSC will turn on and in the winter I want to make sure I have my 4wd available. I will most likely try it this spring and see if the Check Engline light turns on then.
I just decided that instead of changing the CAT i try to 02 sensors first. I took the car to the dealership and another mechanic. Other than OBD2 sensor im not sure if they did anything else to diagnose the problem further.