We may lament the fact that most new trucks today sport more computer power than the Apollo space modules (it's true, we've heard), but the upside to all this electronic gadgetry is that companies ...
I have a JET Performance Chip forsale. Sticket says it fits a '92 4.0L. I put it in my '94 XJ and it worked great. Selling it since I sold the XJ, asking $200 OBO. Email me with questions/offers.