[jhbodle]

Does anyone else's tachometer change the redline to 1250rpm when shifting from Neutral to Drive when cold? If you move off it resets back to normal.

[jhbodle]

Just me then?

[marcvtec]

grab a pic , kinda hard to see, without actually seeing it.

[jhbodle]

Finally found a way to upload a video of it - look at the redline move on the tach when I select Drive:

https://www.dropbox.com/s/vse4v192qt...%2054.mov?dl=0

[Miko M]

Originally Posted by jhbodle

Finally found a way to upload a video of it - look at the redline move on the tach when I select Drive:

https://www.dropbox.com/s/vse4v192qta7b6x/Video%2008-12-2018%2C%2011%2018%2054.mov?dl=0

Dammmn
Something wrong bro!
What happens when you start driving?

[GUNGASLOW]

Kaboom!!!

[lemetier]

Originally Posted by jhbodle

Finally found a way to upload a video of it - look at the redline move on the tach when I select Drive:

https://www.dropbox.com/s/vse4v192qt...%2054.mov?dl=0

Normal.

It's indicating the unloaded cold rev limit in N, and when in D, indicating the drivetrain is not warmed enough for LC activation.

If you stop every mile for the first 6 miles, the range displayed in D while stationary will progress higher each time.

[Miko M]

Originally Posted by lemetier

Normal.

It's indicating the unloaded cold rev limit in N, and when in D, indicating the drivetrain is not warmed enough for LC activation.

If you stop every mile for the first 6 miles, the range displayed in D while stationary will progress higher each time.

This has nothing to do with LC
All he did shift from N to D
Mine doesn't do that, it shows yellow part/red but it never goes down that low.
Lowers I have seen is 3.5K at -15deg

[lemetier]

Originally Posted by Miko M

This has nothing to do with LC
All he did shift from N to D
Mine doesn't do that, it shows yellow part/red but it never goes down that low.
Lowers I have seen is 3.5K at -15deg

US car compared to RoW car. As the OP stated, it only occurs when stationary. Once it's moving, the bands change. US cars don't have the lean burn warm up cycle (maximum power not available) and won't display the same.

[Miko M]

Originally Posted by lemetier

US car compared to RoW car. As the OP stated, it only occurs when stationary. Once it's moving, the bands change. US cars don't have the lean burn warm up cycle (maximum power not available) and won't display the same.

Sorry I don't know what RoW means
I guess lean warm up cycle is not what we have as cold start where it idle's higher at the start?

[jhbodle]

Originally Posted by lemetier

Normal.

It's indicating the unloaded cold rev limit in N, and when in D, indicating the drivetrain is not warmed enough for LC activation.

If you stop every mile for the first 6 miles, the range displayed in D while stationary will progress higher each time.

Interesting - does the rev limit in N increase as the engine warms up or is it a hard limit at 1250rpm to protect the engine from unloaded revs? I've heard that revving an engine with no load is bad for it.

[lemetier]

Originally Posted by Miko M

Sorry I don't know what RoW means
I guess lean warm up cycle is not what we have as cold start where it idle's higher at the start?

Rest of World. OP is in the UK and has an EU6d-temp car with Petrol Particulate Filters. Those cars run different warm-up cycles (high idle is shorter duration and the fuel trims are leaner to achieve normal operating temps faster). They also run an extra lean burn trim when regeneration of the filters is required.

I used LC for simplicity sake since it's a combination brake stand/clutch drop. What's being displayed is the stationary in-gear brake stand redline which will increase with time and distance. The intentional changes from D to N and back show it swinging from one end to the other.

Originally Posted by jhbodle

Interesting - does the rev limit in N increase as the engine warms up or is it a hard limit at 1250rpm to protect the engine from unloaded revs? I've heard that revving an engine with no load is bad for it.

1250 redline appears in D while stationary and cold, not N. If you were to try and do a brake stand start, it wouldn't rev above 1250 at that point.

[jhbodle]

Oh OK I think I get it, so it's like a progress bar to tell you how long you've got left before LC can be activated?

[Miko M]

Originally Posted by lemetier

Rest of World. OP is in the UK and has an EU6d-temp car with Petrol Particulate Filters. Those cars run different warm-up cycles (high idle is shorter duration and the fuel trims are leaner to achieve normal operating temps faster). They also run an extra lean burn trim when regeneration of the filters is required.

I used LC for simplicity sake since it's a combination brake stand/clutch drop. What's being displayed is the stationary in-gear brake stand redline which will increase with time and distance.

1250 redline appears in D while stationary and cold, not N. If you were to try and do a brake stand start, it wouldn't rev above 1250 at that point.

Didn't know that...Europe's are always picky as .... lol
I lived there and I know
Thanks for education!

[lemetier]

Originally Posted by jhbodle

Oh OK I think I get it, so it's like a progress bar to tell you how long you've got left before LC can be activated?

In simple terms, yes. Not sure what area you're in, but if within Central London or T-Charge Zone, it's possible the arc range will remain low since there's so much geo-fencing incorporated now.

[marcvtec]

the key point here is - does your redline drop to the say approx 7,000 rpm after 15-20mins of driving - if yes then it is fine.

[Ever34]

My car was outside overnight in a about -15C temperature and it does not do what you have shown in your video.

[lemetier]

Originally Posted by Ever34

My car was outside overnight in a about -15C temperature and it does not do what you have shown in your video.

Canada, which is based on US spec, wouldn't show it. Only EU28, Iceland, Israel, and Turkey market cars delivered so far should show this indicator behavior.

[Ever34]

Originally Posted by lemetier

Canada, which is based on US spec, wouldn't show it. Only EU28, Iceland, Israel, and Turkey market cars delivered so far should show this indicator behavior.

I see...that explains it then