Hi All

 

In the last few weeks the tick over on the yeti (2.0 tdi) has increased from about 750 to 1000 before the car gets to temperature. Now being that it's not petrol so does not have a choke, anyone have any ideas if this is normal and what it's doing.

 

Thanks

Lots of factors affect idle rates and recent weather (temps) are dealt with by the ecu.

It may be about bringing the catalyst up to temperature quicker for reducing emissions.

If there are no other indications of abnormal behaviour I'd regard it as no more than a quirk.

I'd prefer 1000 when stone cold in any case in winter.......750 is a normal hot idle speed.

Hi All

 

In the last few weeks the tick over on the yeti (2.0 tdi) has increased from about 750 to 1000 before the car gets to temperature. Now being that it's not petrol so does not have a choke, anyone have any ideas if this is normal and what it's doing.

 

Thanks

Hi, mine does the same. Don't know why but its always when the outside temperature indicator is 4C or below. I've also had it on very hot days when the outside temp is 25C or above. I've always thought that was to get the climate control working faster.

It can also happen when the vehicle is due a dpf regen. Mine sometimes does it and my Fabia diesel before it did it as well when it was due. It reset it's self after it was completed.

My 2014 110bhp diesel usually idles at about 850rpm. When very cold she will run at 1000rpm. Even when not cold she will occasionally run at this higher speed, but all is clear when you turn ignition off as a regen is in operation.

 

Colin

As you sit at the lower RPM put some more load on the electric supply (Battery) as has always been the case there will need to be assistance from the alternator, 

so try putting on Headlights, Heated Rear Screen, Heated Mirrors and even the AC if not too cool to operate.

The RPM fluctuates.

Hi All

 

In the last few weeks the tick over on the yeti (2.0 tdi) has increased from about 750 to 1000 before the car gets to temperature. Now being that it's not petrol so does not have a choke, anyone have any ideas if this is normal and what it's doing.

 

Thanks

As others have said, mine is the same and more noticeable at this time of the year, so normal behaviour.

Another tick for the normal behaviour.

It seems more ambient temperature related as it does it far more in these colder air temps.

It doesn't appear to be electrical load related - the idle rpm doesn't alter with electrical services on or off at all throughout the seasons, in my experience.

It is perfectly normal.

Really no RPM fluctuation in the summer,

even if the battery is low or you are sitting and then switch on the AC which may increase the RPM for 2 reasons not just the A/C on, turn the fan on full.

If you are sitting with no AC and switch everything on does the RPM sit just as it is and no change.