After just under 1 mile drive, while Sat idle waiting for the kids school to open the engine rpm jumped up from around 800rpm to around 1200 rpm with noteable tone.

I expect a modern engine to spike in cold start up.. Like the choke on a old car.. Until the engine stablises but to remain at this rpm for around 10 mins I find odd without knowing the core reason..

One part of me is thinking It's the car trying to get the engine up to temp quicker for emissions ...

Even after turning the car off and back in, the revs go from 800 to 1200rpm.

Even when the engine was 90 'c oil temp it was still doing it after 13 miles...

An other thing I thought it could be a forced regen. But the fans where not on after turning the car off which is a tell take sign.. Plus no spike it oil temp

Video below..

Anyone has this ?

Edited 29 April, 201610 yr by RickTT

Wouldn't like to say what's causing that. But I had to laugh at the Maxi-dot. Do not depress the accelerator when stationary. What a bossy car!

Wouldn't like to say what's causing that. But I had to laugh at the Maxi-dot. Do not depress the accelerator when stationary. What a bossy car!

Haha.. Yeah.. I enabled eco tips yesterday to see what they were... They will be getting disabled again soon!

Haha.. Yeah.. I enabled eco tips yesterday to see what they were... They will be getting disabled again soon!

 

You need to dust your instrument cluster RickTT

Mine has done this a few times before. My old CR170s used to do it as well. It's a combination of a cold start, the electrical load on the car and the heat demands of the climatronic. A DPF regen gives an idle closer to 1000 rpm IIRC so it isn't that, it also won't initiate a regen until the oil and coolant has been up to temperature for a while. 

 

Also, isn't it amazing that kids know just when you're trying to film something  :p

Mine has done this a few times before. My old CR170s used to do it as well. It's a combination of a cold start, the electrical load on the car and the heat demands of the climatronic. A DPF regen gives an idle closer to 1000 rpm IIRC so it isn't that, it also won't initiate a regen until the oil and coolant has been up to temperature for a while.

Also, isn't it amazing that kids know just when you're trying to film something :p

Kids sure do know !

Also regarding the load.. I switched everything at one point off to see if the load reduced it but didn't...

Not going to loose sleep over it unless it carrys on.. But as above it was the same once the engine was fully up to temp

Cheers

Dup

Edited 29 April, 201610 yr by RickTT

Kids sure do know !

Also regarding the load.. I switched everything at one point off to see if the load reduced it but didn't...

Not going to loose sleep over it unless it carrys on.. But as above it was the same once the engine was fully up to temp

Cheers

Don't forget the engine revs will increase if the battery voltage is low, due to the previously high electrical load, it can take a while to get the battery fully charged, especially with all these fancy electric heaters these cars have got 

Is the Oil indicated temp at 90*oC on Maxi dot or is it the coolant tamp indicating 90*oC on the Gauge ?

Oil.

Are you sure the oil was up to temp mate? Not being funny but even the 2.0 TSI doesn't have warm oil before the coolant is at 90. Your coolant is not even in operating range yet, and you have a diesel. I would be amazed if the oil was at operating temp that soon. So, likely just cold start revs, especially with temps of 2.5oC outside!

 

Actually having re-read the OP (I'll be honest and post my full reply instead of sheepishly editing it before posting lol)... If it was still happening after 13 miles what was the oil temp and coolant temp showing as? That's still not many miles on a derv to get to temp when outside temps are close to zero.

 

Edit: OK this time I managed to watch the whole video (kids of my own pulling at me haha)... The consumers page says you have air con and mirror heaters running, so that'd also account for the usage?

Edited 29 April, 201610 yr by Derv

At the time of the video.. Yes.. Air con, radio, heating and mirrors where on.

However as above I switched these off and it remained the same.

After 13 miles and even a bit of coasting the rpm was still up.

Just been in the car now and it did was fine on start up.

Back home in the drive it did it again and parked on the drive it's high rpm agsin but the oil temp is only at 85 After 5 miles so that may be why.

Ps. My engines have always warmed up quicker than most due to where I love having a 800ft climb which is national speed limit..

Ah Ok then, I'll pass and leave it for someone who knows about the new fangled VAG dag dags. I'm out of ideas.

I reckon it's just due to cold engine and not getting fully up to temp as an odd occurance as you say.

Not going to loose sleep

Edited 29 April, 201610 yr by RickTT

Our Yeti ('61 reg, 1.6 Greenline diesel) does this on incredibly cold mornings, it'll run at 1k rpm idle, but when the engine gets up to temperature, it'll run at 800 rpm idle.

Probably just the engine needing to run slightly faster due to more friction inside the cylinders, and all sorts of other tiny reasons that really shouldn't bother you anyway xD

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