Does the HP tuners for 2004 Jeep Wrangler, 2.4L, really work? JTEC system. Enters the ECU, connects, but the ECU does not open the menu for inserting the updated software and does not allow the exclusion of functions from the menu.
Yes, the problem is that the computer does not provide the menu for entering the new settings. I wrote an email to HP Tuners, but they haven't responded for 15 days. Now we will write to them again. I read in the forum that until 2 years ago it could not be used for Jeep 2003-2004, but now it should be able to. I have doubts, maybe some change in the software and hardware is needed for the 2004 Jeep.OOPs the question WHY you can't program the PCM your self.... Best guess the Scanner/HPTuners is the issue.
I would start with HP tuners they have a tech website I believe.