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  1. Engine Performance
    Hello all, I have been a long time lurker and finally decided to create an account and make a post to ask for help. I have searched everywhere, every thread related to P0171 & P0174 codes but I could not find anything that was close to how my FJ has been acting lately. Here is what happened: I...
  2. Engine Performance
    I used to run K&N filters in all my vehicles so putting one in the FJ was just a normal "mod" till my MAF started throwing codes on my Torque+ App. A little research and out came the K&N, removed and cleaned the MAF with MAF cleaner spray, reset codes... still threw an error after about 50...
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