Data Log Questions

blk03shkr

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Jul 18, 2007
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Atlanta, GA
I data logged my 2003 mustang yesterday just driving around town and logged the MISCYL PID for all 8 cylinders using my SCT Xcal2 and Live Link. For the 12min of driving I did I didn't physically notice any misfires but there are random numbers in the datalog from 0 to 60,000 for these PIDs. Majority are 0 but occasionally numbers show up, appears to be random. Can anyone tell me what these numbers mean? Is it something to worry about?
 

decipha

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Jul 12, 2008
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New Orleans, LA
correct, it should be single cylinders and incrementing casually each time the cylinder misfires, i have a drewtech cable i use to poll the misfire TIDs, its usually a test that lasts a few moments to see which cylinder is misfiring. Ive personally only found it to be useful when yu have a random hard stumble, otherwise if you have a cylinder or more dead as in coils unplugged or failed then the engine inertia is so low that a misfire isnt likely to be calculated
 

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