It works pretty well
With the flowmaster outlaw cat back exhaust, K&N FIPK cold air intake the Helix Cable TBS, and a 180 degree thermostat, the Jet Stage 2 PCM works pretty well. It smoothed out my idle, scored about 2.1 MPG, flattened out my torque curve a little bit, and gives me more usable power across my power band,which surprised me, coming from a stage 2 unit. Normally, you would expect all that from a stage 1 unit, and a lot more peak power from a stage 1 unit.
Expectations Met on 05, 4.0 Taco
Instantaneous initial startup with no CEL was a good indicator. Existing harness didn't have much slack and PNP location space was tight, couldn't get PNP Velcro properly seated due to tension on existing harness but opted for tight "click" connections. Runs smoother, accelerates and shifts nicely, waiting for warmer weather and boat towing for power test.
this thing works! easy to install too
took me 3 minutes. This is one of those rare items that works! 2013 Jeepo grand cherokee is now responsive as a v8! no joke. i have oversized tires that made my GC sluggish. this feels like a 30HP jump. seriously. it has many setting or can be turned off. I love this! best purchase yet for an upgrade to my car WITHOUT messing with the engine or air intake( which in my opinion does nothing but make your car louder)