Preliminary Evaluation · HIGH SPEED STALLING · Opened 1987-08-19 · Closed 1988-03-10
Investigation
Action number
PE87048
Type
Preliminary Evaluation
Open date
1987-08-19
Close date
1988-03-10
Manufacturer
Chrysler (FCA US, LLC)
Affected makes
JEEP
Affected components
VEHICLE SPEED CONTROL:LINKAGES
Affected model years
1987
Affected (make, year) variants
1
Summary
SUMMARY OF INFORMATION FROM MANUFACTURER:THE FUEL INJECTED 6 CYLINDER(242 CID) IN-LINE ENGINE IS APPARENTLY NEW TO THE INSTALLATION INTO THEJEEP CHEROKEE.ANALYSIS:THE FUEL INJECTED ENGINE ALLEGEDLY STALLS WHILE THE VEHICLE ISCRUISING AT HIGHWAY SPEEDS (35-55MPH).TWO FAILURE MODES HAVE BEENIDENTIFIED, STALLING WHEN CORNERING OR GOING OVER A BUMP AND THE OTHERIS ENGINE STALL WHILE CRUISING--USUALLY IN HIGH AMBIENT TEMPERATURESITUATIONS.JEEP HAS IDENTIFIED A PROBLEM WITH THE EXHAUST MANIFOLDGASKET FIT TO THE CYLINDER HEAD WHICH AFFECTS THE HIGH TEMPERATUREPERFORMANCE OF THE CPS (CRANK POSITION SENSOR/ENGINE SPEED SENSOR)MODULE. CHRYSLER/JEEP HAS A TASK FORCE TO STUDY THE PROBLEM.STATUS:CRECOMMEND CLOSING THIS PE AND CONTINUING THE ANALYSIS IN AN EA.#===