Many of the 4.0 motors were never equipped with a PCV, but use the smaller line at the back of the valve cover to the intake as a meter orifice. The system is called CCV, for Controlled Crankcase Ventilation. Installing a PCV will overpressurize the engine and blow gaskets and seals.
Themasatat
There is no such thing as a 2002 Cherokee Laredo. The last year for the Cherokee was 2001, and the last year it came with the Laredo trim was 1992. I have a 2003 Cherokee Laredo so this awnser makes no sense at all. Do you have a GRAND Cherokee Laredo? Those are still being made. They are not the same as the Cherokee.
Yes you can
I have a 1992 Jeep Cherokee Laredo. It is under the hood, on the left, near the windshield, in a black box.
On my 1992 Jeep Cherokee Laredo it is on the front right of the engine. There should be a picture of an oil can on the cap with the words fill oil here or something along that line on it.
I bought a 92 Jeep Laredo and found it had a 1994 jeep engine in it.
1990 -1993 injected Festivas do not have a EGR valve
Yes they should interchange without a problem.
A scan tool is required.
The fuel pump relay on a 1992 Jeep Cherokee Laredo is located under the hood. The fuel pump is located under the vehicle and is attached to the main harness.
5w30 or 10w30 (do not use synthtic)
yes NO, The 89 uses a speedometer cable where the 92 is electronic.