So a friend of mine finds a 2018 manual and does a PPI. The report shows 1 over rev in level 1. All great!

He then tracks the car to an auction before being bought by the dealer selling it and in there the report shows many in 1,2,3 and some in 4. He passed but now is scared of manuals as seems a stealership can errase the over revs.

I thought that was the one thing that could not happen.

 

Did the DME report show the VIN on the same page? That sounds more like he was given the wrong DME report for that car.

How it would have only range 1 when being sold initially and then would have more when being sold again doesn't sound right to me. But it doesn't sound like it was erased. Or it sounds like like the selling dealer had someone take it out and miss a shift. I would be curious to see how long ago the over revs happened.

 

To clarify, the car showed over-revs before being bought by a dealer. Then the dealer put it up for sale with 0 over revs.

 

Oh that makes sense.

I would still be curious if there were pics with the over revs and VIN in the same pic. New dealer may not be showing the correct DME report.

 

Yeah, no way for a dealer to do that and it not be detectable.

 

Sounds like maybe 2 different reports were referenced. To erase that info would defeat the whole purpose of it, in my opinion.

 

Would be interesting to hear from those who are very familiar with the ECU, but I wonder if a) over-revs can be cleared and b) if a new ECU would clear those codes.

The latter would really decrease the value of 7MT cars with ECU replacements…at least for me.

 

ECUs do not have non-volatile memory. If you remove the backup power source connection it loses all long term stored data. I suppose it's possible that Porsche has something different.

 

But then operating hours would be reset so if you are buying a car that is 3 years old with 12k miles it should have about 330 hrs. Most cars on mixed driving have average speed around 35mph. If car only have 50 hrs, walk away as that would give average speed of over 200mph. Lol.

 

Anything reported in range 1 and 2 shall be discarded as they are only recording ignitions at or just below the rev limiter. Range 3 is just over the limiter, not that severe. Ranges 4, 5 and 6 is usually down shifting to the wrong gear but without blowing engine up.

Dealers can delete the over-revs if they have passed an inspection and certain amount of hours of operation after the last registered over-rev.

 

1. conducts dme analysis, tell seller this car is junk, buy at scrap price
2. Crack cpu, delete over rev, sell at premium.

hummm

didnt Ferrari get in trouble for this and roll back of miles?

 

I just checked with two different dealership service managers with over 40 years of experience. Both are good friends who would not lie to me. The statement above is absolutely false.

 

Oh, really? Please post a link to a credible reference to support your claim.

 

Thanks for this info. I'll keep it in mind next time I buy a Pork.

 

Google ECU rest. Take your pick. I have done it several times. Like I said, I don't know if Porsche does something different.