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Just ordered the NTK O2 sensor from Summit. We'll see if it changes things. Thanks for all of your help!

Yes it is. Cant get any codes from the diagnostic port (OBDII ?) For some reason, it seems to not be working.

My first TJ is breaking me in, nicely. It's hard to start, pretty sure that is the fuel pump (Check valve). What is stumping me: When it does start, from cold. It sounds like it's running on 4 cylinders (Its a 4.0) Pop the throttle and idle it up and it smooths right out. In...