rfl

I need some advice right away: I just placed a deposit on an '03 X50 at a Porsche dealer. (More details to follow once I close on the car later this week.) I asked the dealer whether there were any over-revs on the car and he told me that the car could not have had any since the dealer would not be selling it as certified if it had any over-revs. I asked him to ask his service department to print out the report showing the Type I and II over-revs, which he agreed to do. What is the exact name of the report or documentation that I should be getting back to nail down this issue? Is it a big deal for the dealer to generate that report? (I did not see it as part of the certification checklist I reviewed.) What part of the engine actually records this information? Can it ever be erased or altered by the dealer to hide the over-revs? Thanks.

wross996tt

I'm not sure about a report, but you can have them hook up their PIWIS or PST2 and just go to the ECU information screen. It will show Type I and Type II over revs...like the screen below. It is stored in the ECU and can not be erased or altered (I'm sure some could hack it, but not just anybody). Oh the screen shot is from durametric, but it will be similar (and yours will be Motronic 7.8)

JasonAndreas

There are some aftermarket tools available to anyone with a few $$$ that will zero the over-rev counters.

Condor Man

I have a few Questions regarding this Over Rev Issue..

1) How does an Over Rev 1 Differ to an Over Rev 2??

2) How can our cars Over Rev if they have a Rev Limiter??

3) Does the Over Rev count if it is a split second or does it need to be Over Reved for a period of time??

1AS

Answered many times:
I: Bounce off the rev limiter- happens to everybody, can't be avoided if you use first gear very hard
II: Missed downshift- eg. when trying to shift from 5th to 4th, you catch second, and force the engine to rev to a very high number
Counts each ignition cycle instantly. AS

Condor Man

Thanks AS

wross996tt

you should read through this:

over rev thread

rfl

The dealer's DME vehicle data report states in part as follows:

Number of ignitions, range 1
340 346.0 h
Number of ignitions, range 2
--
Operating hours counter
347.8

Can anyone tell me exactly what this means?

Also, the report shows "Total distance" of 014328km, which equals 8903 miles, which is 309 miles less than on the odometer. Why would there be a discrepancy?

Thanks.

Kevin

rfl;

You have 347.8 hours of operation on your engine.

You have Zero Type two over-revs which is telling you that there is "NO" forced mechanical mis-shifts to hurt your valve train. Which is VERY good.

You have a low type 1 over-Rev which is time spent at Redline or shifting at redline with Rev limiter engaged.

The last time that someone shifted and hit the REV limiter is roughly around 1.8 hours ago.

Don't worry about these low counts for type 1's..

rfl

Thanks. I am picking up the car on Friday!

jimq

Enjoy your new toy! We will need pictures ASAP

rfl

Thanks. Full details and photos should be posted by Saturday.

MidnighTT

I know Statman already pointed to the thread I started on this topic, but I feel compelled to respond to this post in this thread.

I think it is very misleading to equate type 2 overrevs with missed shifts. Certainly a missed shift can cause type 2s, but I have proven that you can generate type 2s by hitting the rev limiter before an upshift.

Jeff

JasonAndreas

With stock/original software or was the ECU tuned?

MidnighTT

This was with a UMW tune but unchanged rev limiter.

Jeff