My lly has 38 inch tall tires, edge w/***, preditor programmer, afe intake, turbo back 4 inch exhaust(no cat) sun coast stage 3 tranny and still goes into limp mode. Every time I am heavy on the gas it has no power over 2000 rpm till I turn off the motor and let it set a while. Never once has the engine light came on. I plan to tow my Jeep with it this summer but I am scared.

Does the predator show a 1093 in the DTC codes? You can erase the code while you are driving with the predator hooked up and get your power back...

Sounds like the 1093 fuel starvation code, I have set this one off myself a few times and no engine light. Seems to be only when putting foot into throttle when driving along and not from a dead stop. You can do a search on the topic and find some interesting reading but it still seems to be a problem.

Tranny limp mode will leave you stuck in third gear, with full engine power. P1093 will leave you limited below 2000 RPM, with reduced engine power. You have P1093.