Hombre S Regular Cab 4WD V6-4.3L (1999)
Starter Motor: All Technical Service Bulletins
Crankshaft Position Sensor (CKP) - Difficult Starting
BULLETIN NUMBER:
SB00-01-S006
ISSUE DATE:
MAY 2000
GROUP:
ENGINE
NO HARD OR SLOW START, BACKFIRE OR KICKBACK DURING CRANK/START, OR UNUSUAL NOISES DURING CRANK, DTC P0338
AFFECTED VEHICLES
1996-2000 Hombre (TH) models with 4.3L V6 engines
SERVICE INFORMATION
Condition:
Some customers may comment on one or more of the following conditions:
^
Backfire during crank/start
^
Kickback during crank/start
^
No start
^
Slow or hard start/crank
^
Grinding or unusual noises during crank/start
^
Cracked or broken engine block at the starter boss
^
Broken starter drive housing
^
Broken starter ring gear on flywheel
Cause:
A condition may exist that allows the crankshaft position sensor to command up to 50 extra degrees of spark advance during engine cranking only. This
in turn exposes the engine to higher than normal cylinder pressures which may result in an inoperative condition to the starter drive housing, the engine
flywheel starter ring gear, or the engine block at the outside edge of the starter boss.
Correction:
Inspect for a stored powertrain DTC code P0338. This DTC will NOT illuminate the MIL (Malfunction Indicator Lamp). If this code is stored, the
Crankshaft Position Sensor (part # 8-10456-607-0), must be replaced and the remaining components inspected for damage (engine block at the starter
boss, the starter drive housing, and the engine flywheel starter ring gear).
NOTE:
When DTC Code P0338 is set, failure to replace the Crankshaft Position Sensor could result in repeated inoperative conditions of the starter or
flywheel.
IMPORTANT:
Some flywheel wear is normal; broken or missed teeth and/or cracks, are not normal.
SERVICE PROCEDURE
1.
Perform diagnostic procedures as described in the appropriate Workshop Manual and correct any other faults found prior to proceeding to step 2.
