Raider V6-3.7L SOHC (2006)
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From the OBD-II Monitor Menu, scroll down and select "Which Cylinder is Misfiring."
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Click on the "Monitor Data" icon at the bottom center of the screen.
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Scroll to display cylinder misfire data for cylinders 1 - 6.
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Let the vehicle idle and monitor the misfire counts for all cylinders for 1 minute.
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If misfire counts for any individual cylinder exceed 10 during the 1 minute monitoring time, that cylinder should be monitored further using
steps 3 & 4.
3.
Rev the engine to 3,500 to 4,000 RPM and release the throttle. Do not hold elevated engine speed. Let it return to idle.
4.
Monitor the cylinder misfire count for one minute. If the misfire rate falls to less than 5 per minute, perform the repair procedure. If the misfire
rate DOES NOT fall to less than 5 per minute, repeat step # 3 and re-monitor up to ten times. If the misfire rate DOES NOT fall to less than 5 per
minute after repeating Step # 3 ten times, this bulletin does not apply. Further diagnosis is required.
Repair Procedure
NOTE:
When replacing valve locks only, carefully follow the procedures outlined in the Service Manual for removal of the rocker arms. To remove a
given rocker arm, a specific cylinder must be at either TDC or BDC.
1.
Use procedures outlined in Section 11B - Service Information <3.7L> of the Service Manual to replace the valve locks only (refer to Springs -
Valve - Removal) on the cylinder head where there is no misfire. Replace ALL intake valves and the valve locks of the cylinder head that has the
misfiring cylinder.
2.
After the repair work is completed, repeat Step # 1 through Step # 4 of the Diagnosis, monitoring all cylinders for misfire.
NOTE:
Bank 1 on Raider (odd # cylinders) is the Driver's (LH) side of the vehicle.
3.
A cylinder on bank # 2 may very rarely exhibit a misfire at idle due to a valve that does not rotate properly. If bank # 2 now has a misfire, then the
new valve locks have allowed a non-rotating valve with uneven wear to rotate and induce a misfire. In this case, replace the intake valves on bank
# 2.
4.
When you have completed the repair procedure, recheck for DTCs. Diagnose and repair as needed.
PARTS INFORMATION
