Jeep Cherokee (XJ): Special tools
4.0L ENGINE
Disassembly and assembly. Cleaning and inspection. Specifications
Disassembly and assembly
CYLINDER BLOCK
DISASSEMBLY
Refer to the applicable sections for detailed
instructions.
(1) Drain the engine oil. Remove and discard the
oil filter.
(2) Remove the wa ...
...
Other materials:
Modes of operation
OPERATION
As input signals to the Powertrain Control Module
(PCM) change, the PCM adjusts its response to the
output devices. For example, the PCM must calculate
different injector pulse width and ignition timing for
idle than it does for wide open throttle (WOT).
The PCM will operate in two ...