Beating a dead horse (4.0 42RLE)

[Hasselblad]

Im running 5.13s and 33s. the trans sees the lower load and shifts instead of holding gears unless I keep my foot in it. Probably why the shift point adjustments made available by HPTuners seems to wake them up so much.

The HPTuner with fixed shift points did wonders for my stock Rubicon with 32". I plan to regear one of these years to 5.13 or 5.38, but the tuner made a noticeable improvement.

 

[schmidtke_c]

5-25 update.

Finally get to post the solution. So after installing the fuel pump and getting no good results I ended up putting a new exhaust on from the cats back. All 3 brand new with 4 ntk o2 sensors. 450 dollars later started up and ran like a charm. I don't want to jinx it but I'll say this is solved