JET says to run a 180 degree thermostat for best results. Stock Jk t-stat is 195 degree. The Jet stage II has been in for 2 weeks, felt a difference inititially. Now a drastic change, worse than before installed. Can the Jet chip potentially screw up ECU and or mapping?! AirRaid spacer shouldnt make it worse...??

 

Did you write this while driving?

 

The Jetchip simply bypasses the PCM's air/fuel ratio, spark timing, tables. It does NOT overwrite anything in the PCM. It's an expensive worthless piece of hardware that will not give you what they advertise. But you will find some "seat of the pants" horsepower stories online about people swearing their Jeeps run so much better now.

You're airraid spacer is another non-beneifiting gimmick that will give you absolutely nothing but a little extra noise. Please don't get offended that this costly stuff doesn't work either, it's been proven over and over again and again.