The revs of concern (>Rng 3) were almost 150 hours ago, probably not a huge concern, but wow, the range 5 at 3 hours.. somebody was thrashing it & missed a shift right out of the dealers parking lot when it was brand new..

 

Hi - can I get an opinion on the DME scan below pls? much appreciated!!

Number of ignitions at speed > maximum
speed, range 1 8866
Number of ignitions at speed > maximum
speed, range 2 2071
Number of ignitions at speed > maximum
speed, range 3 281
Number of ignitions at speed > maximum
speed, range 4 40
Number of ignitions at speed > maximum
speed, range 5 0
Number of ignitions at speed > maximum
speed, range 6 0
Operating hours counter reading at overspeed,
range 1 874.000 h
Operating hours counter reading at overspeed,
range 2 778.800 h
Operating hours counter reading at overspeed,
range 3 359.300 h
Operating hours counter reading at overspeed,
range 4 311.400 h
Operating hours counter reading at overspeed,
range 5 0.000 h
Operating hours counter reading at overspeed,
range 6 0.000 h
Operating hours counter 875.000 h

 

Missed shift about 565 hours ago.

But the recent (about 1 hour ago) range 1s show that the car is being joy ridden during sales demos. That kinda stuff pisses me off.

 

Thanks LexVan - can you provide insight on how to read these scans? How are you able to tell that it missed a shift about 565hrs ago and that 1hr ago range 1s show that the car is being joy ridden? Would this scan prevent you from buying the car? thanks!

 

As Lex has said, the car had a missed shift around 10,000 miles.. (you have 30K on the car?)

I tend to be more comfortable with cars that only show Type 1 thru 3 mis shift OverRevs..

If you are worried about it, get a Fidelity Warranty...

 

You have to look at the total or current operational hour. Then look at the episode/event.. For the Type one event subtract the number reported from the operation hours. You can go down the list and chart out when each missed shift happened.

As a side note, I have set my Rev limiter on my car AT 7K RPM's.. I took one for the team and BANGED the Rev limiter in 2nd gear HARD to see the Type OverRevs.. I got Type 1's registered, and Type 2's Registered, no type 3's or higher..

 

Total hours are 875.

The range 4 happened at about hour 311. So 875-311=565.

Same math for the range #1.

 

Thanks Kevin -

I just googled how to interpret DME scan results. Please let me know if I'm right here: so for range 1 there has been 8866 ignitions past 7400rpm (midpoint of range 1). There are 3 ignitions per revolution. There are 123.3 revs per sec. So 123.3 x 3 = 369. 8866 / 369 = 24. So there has been 24 events where the engine overreved in range 1???

 

No. There have been 8,866 "events" in that range #1. The amount of actual time may be 24 seconds total if your math and formula are correct. I don't know for sure the formula.

 

You did it right - using his numbers the 8866 range 1 ignitions means that the engine spent about 24 seconds in range 1 over its life. Also, the last range 1 ignition occurred at op hour 874 but without a previous reading you don't know how many range 1 ignitions occurred at hour 874 - could have been 3, 30 or 300 - just don't know.