Comanche 2WD L4-150 2.5L VIN E TBI (1989)
DEALER SERVICE INSTRUCTIONS
Please remove and discard the original recall notification (dated December, 1994) from your files and replace it with this revised procedure.
This service requirement applies only to 1989 model year Jeep Cherokee (XJ), Comanche (MJ) and Wrangler (YJ) vehicles equipped with a 2.5L engine
and California emission control system.
Failure of the oxygen sensor, PCV hose (YJ only), transfer case vacuum hose (4WD only) and/or fuel tank vent valve (FTVV) boot (YJ with steel fuel
tank only) on the above listed vehicles may cause the vehicle to be in violation of California Emissions Standards. In addition, the exhaust manifold may
produce an exhaust leak noise. To correct these conditions, the listed components must be replaced and the exhaust manifold must be checked for an
audible leak and replaced as necessary.
PCV hose replacement as defined in step C27 or Section E of the service procedure, only applies to Wrangler (YJ) vehicles. Cherokee (XJ) and
Comanche (MJ) vehicles are equipped with a crankcase vent (CCV) system and do not require PCV hose replacement
Be sure to provide a Vehicle Emission Recall Proof of Correction Form to each owner upon completion of the recall service, for owner use as proof
during renewal of the vehicle registration.
PARTS PACKAGES:
Each involved dealer, to whom vehicles in the recall were invoiced, received enough Emission Service packages to service 25% of those vehicles. In
addition, each California Jeep & Eagle dealer received one Exhaust Manifold package.
Exhaust Manifold - Inspection/Removal
A.
EXHAUST MANIFOLD INSPECTION:
1.
Start engine and allow it to idle. Raise hood and listen for an audible exhaust leak. If no leaks are heard, proceed to Step D. If a leak is
heard, continue with Step B.
B.
REMOVE EXHAUST MANIFOLD:
Warning:
Exhaust manifold becomes very hot during engine operation. Make sure engine has cooled sufficiently before attempting manifold removal.
1.
Disconnect the negative battery cable.
2.
Remove the air inlet bonnet from the throttle body and inlet hose from the air cleaner. Remove the heated air hose.
3.
Loosen the power steering drive belt tension and remove the belt from the power steering pump pulley.
4.
Remove the power steering pump and brackets from the water pump and intake manifold. Set the pump aside.
5.
Remove and install the fuel tank filler cap to relieve the tank pressure.
6.
Disconnect the fuel supply and return lines from the throttle body.
7.
Disconnect the accelerator cable and speed control cable (if equipped) from the throttle body and the hold down bracket.
Caution:
When disconnecting the speed control connector at the throttle body, do not pry the connector off with pliers or a screwdriver. Use finger pressure
only. Prying the connector off could break it.
