FCA Customer Care
Join Date: Jan 2012
Location: MOPAR World Headquarters
I found this information from our technical people: FYI - ignore if not interested
STAR Case Number: S1218000003
Release Date: 01-27-2012
Customer may experience a die out, stall condition at any speed while driving or while at a stop. The engine usually restarts right away on a crank attempt. The symptoms may also be described as the engine appearing to lose power with a report that it restarts by itself. They may also be described as a missing, bucking or hesitation. Symptoms may also be accompanied by a MIL on with DTCs set. The actual DTCs may vary, however P0688 - ASD Relay Sense Circuit Low is usually set in PCM with possible power-up-at-speed or loss of communication DTCs set in various modules.
The only sure way to diagnose this condition is to capture the event with the data recorder. Graphs of some or all pcm data items during the event will usually indicate a loss of pcm "consciousness" or
communication represented in blank data for a given time on the graph. The picture below (Fig. 1) shows data missing on the table as dashed lines.
The duration of time that the data is missing or the actual data itself that drops out is not consistent and can happen on one or more data items, but not necessarily all. The actual graphs for the corresponding data items that drop out appear in the picture below (Fig. 2).
Note that the data drop out will occur just before the engine speed (RPM) drops off to 0 (representing the stall). Also note that the you may have to zoom in on the stall event to see the data “drop outs”.
If the above conditions are present, inspect all spark plugs and coils for damage, signs of arcing or other abnormalities. If nothing is noticeable, replace all spark plugs and retest for the condition . If the condition is still present, start by replacing one coil. If the condition is still present, continue moving that new coil around to the other cylinders to substitute for the other coils in a process of elimination until the condition is no longer present. Replace the last coil that was substituted for just prior to the elimination of the condition.
NOTE: BE SURE REPLACEMENT SPARK PLUGS ARE O.E.M. THERE HAVE BEEN INSTANCES WHERE AFTERMARKET PLUGS ARE MARKEDLY DIFFERENT THAN OEM SPARK PLUGS. PARTS AND ARE PROPER FOR YOUR APLICATION. CARE SHOULD BE TAKEN DURING SPARK PLUG INSTALLATION TO REDUCE THE CHANCE OF DAMAGE TO ANY PLUG INSTALLED AND TO KEEP NEW PLUG INSULATORS CLEAN.
O.E.M. spark plugs as required. Coil(s) as required.