Hello folks,
I have a '14 JK with the 3.6 and a Boosted Technologies blower. Ive been dealing with the )Z( light and limp mode issue for quite some time now. I have replaced the accelerator pedal and throttle body and nothing helps yet. Sometimes it runs well and has plenty of oomph and sometimes not.
What I am seeing right now is this: at times there seems to be like a switch that gets thrown relating to gas pedal response. I can be cruising along at a steady pedal position and suddenly like a switch thrown i will start slowing down and have to press the pedal mot to keep up speed and it will seem like the first portion of pedal depression does nothing. Then like a switch again, the throttle starts acting normally. During the off times, when I slow down, the )Z( light will come on and I have to shut of and restart the engine to clear this light.
Does anyone have any suggestions on whet I should be looking at? As I said, gas pedal and throttle body are new, and connectors on tight.
Thanks in advance.
Mark

 

Have you run this past the vendor of the FI system? Have you tried to read codes as that is a good starting point? Any relation to outside air temps vs this issue happening?