and fuel economy nudged up from the 258, and the addition of this engine boosted the XJ powertrain into a somewhat more respectable realm.With the change to the 4.0 engine, the engine bay of the Stage II Jeep XJ was changed in 1987, including small changes to the firewall, inner fenders...
This 4.0 had made it into the Wrangler late enough to get the Mopar engine management system, bypassing the Renix system as found in the XJ from 1987-1990. Power was up and fuel economy nudged up a bit from the 258, and the addition of this engine boosted the YJ powertrain into a ...
Discussion starter · #21 · Aug 20, 2016 The RTV has failed me! Two nights ago the Jeep wouldn't start. No spark, no fuel. ASD relay was getting no ground from PCM. Relays clicked randomly. When in cab turning key, I noticed the CEL flash when the relays were clicking. I pulled...
and fuel economy nudged up from the 258, and the addition of this engine boosted the XJ powertrain into a somewhat more respectable realm.With the change to the 4.0 engine, the engine bay of the Stage II Jeep XJ was changed in 1987, including small changes to the firewall, inner fenders...