Help Reading DME report
03-22-2018, 10:59 AM
#17
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DME report for a PDK car is an odd thing to ask for. It’s not common as it’s basically unheard of to over rev one. It’s also a 2017 under warranty. Buy it. These aren’t the fragile Porsches of the past.
03-22-2018, 11:16 AM
#18
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Worth doing a PPI to make sure? No one has addressed the Misfire question, im not sure if it even means anything. Any insight?
03-24-2018, 12:56 PM
#19
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See http://www.911virgin.com/porsche/rev-range-information/ for some info.
TL;DR:
So, basically type 1 overrevs are a non-event. Type means that the limit might have been hit.
The misfire number is interesting. I can’t find anything quotable. Operating hours are not shown so calculations are a guess based upon at least 208 hours and an average 2500 rpm engine speed guess... 0.057% misfire rate. I’ll spare the blow-by-blow on other calculations, but if we assume that at one point there was an issue that caused a consistent misfire, that number of misfires could have been accumulated in a few hours. For example, a tank of crappy gas. On the other hand, misfires happen all the time at some low rate. If the rate goes above some threshold the DME will store a misfire error code.
Should you worry about it. Dunno. Probably not.
TL;DR:
Originally Posted by TFA
- 987, 997, 981 and 991 models have the ability to record ignitions in 6 different ranges. Rev Range 1 and 2 record ignitions at or just below the limiter. Ranges 3 through 6 represent increasingly higher engine speeds
The misfire number is interesting. I can’t find anything quotable. Operating hours are not shown so calculations are a guess based upon at least 208 hours and an average 2500 rpm engine speed guess... 0.057% misfire rate. I’ll spare the blow-by-blow on other calculations, but if we assume that at one point there was an issue that caused a consistent misfire, that number of misfires could have been accumulated in a few hours. For example, a tank of crappy gas. On the other hand, misfires happen all the time at some low rate. If the rate goes above some threshold the DME will store a misfire error code.
Should you worry about it. Dunno. Probably not.