Afternoon all,

 

Got a question for anyone with a late model VRS TDI, mines a 66. In this current cold spell, if you have the Climate on high, does your tickover go to around 1200rpm and stay there?

Just noticed this with mine, and my previous 63 plater did not do this, the high tickover appears to remain until car is fully warm, then settles back to normal.

Takes me back to my early cars with a choke when you had to keep the revs up to prevent them stalling

 

Thanks

Dave

Mine same...66 plate vrs tdi also...

Tickover will also be higher if its doing a DPF regen also.

Regan, please read thread at the top "my diesel smells ect."

Afternoon all,

 

Got a question for anyone with a late model VRS TDI, mines a 66. In this current cold spell, if you have the Climate on high, does your tickover go to around 1200rpm and stay there?

Just noticed this with mine, and my previous 63 plater did not do this, the high tickover appears to remain until car is fully warm, then settles back to normal.

Takes me back to my early cars with a choke when you had to keep the revs up to prevent them stalling

 

Thanks

Dave

 

Yes. Mine does this, not just during a regen but when warming up, especially with everything maxed out to defrost/warm up. 

Sounds like a change to improve the AC performance to demist the system quicker.

I don't think mine does this (from 2014) but its perhaps an improved calibration in the latest MY.

 

If you switch-off the "max" heating setting, does the engine speed return to 800-900rpm?

I haven't ever tried to find out  

 

With lights on (dark mornings and evenings), climate control on max, and heated seats, mirrors, rear screen and windscreen on, it is probably drawing a fair bit of power?

if after reaching 90 deg temperatute revs go lower thwn it's trying to compensate the power consumption and heat also engine faster.

I've noticed that if a regen is coming revs are higher from start (faster warm up) but continue after reaching operational 90 degs

Yes it's normal. With all that extra electrical load, the engine has to drive the alternator faster and provide the raw mechanical energy to drive the AC compressor. The batteries rating is pretty low to be honest, probably to save cost and some weight. To save fuel, the alternator only gives maximum output under braking, or on over-run, or when the system decides the battery needs some extra juice.