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rev counter a bit high or is it just me

Started by siggieman30, August 22, 2014, 06:39:11 AM

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August 22, 2014, 06:39:11 AM
ok so i noticed yesterday that my rev counter was idling at just under 1000 rpm, is this normal for a TDI or have i have i just not noticed it before? it literally all of a sudden happened after i started my car. i have VCDS lite so what should i be looking for with regards to problems?
many thanks guys
August 22, 2014, 09:49:46 AM #1 Last Edit: August 22, 2014, 09:56:09 AM by siggieman30
just to add to this, it is when i have just started the car and well after it has been started too
August 22, 2014, 10:27:32 AM #2
Being that those are 250rpm graduations on the tacho, that looks fine to me, the idle can be adjusted a little with VAG-com- see here, but reading that suggests optimum idle is about 900rpm, yours looks to be around this so I wouldn't worry about it- my tacho needle is in exactly the same place at idle!
Always learning..... Often by mistakes!
August 22, 2014, 10:32:02 AM #3
Ah right that's brilliant. Must just be where im used to my ex car's which are petrol maybe
August 22, 2014, 10:41:42 AM #4
Initial start from cold will give a higher reading 903 RPM iirc once up to normal 90deg will drop back to 860 RPM
A faulty coolant temperature sensor can cause this, also shows a fault in Vagcom/VCDS lite.
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2023 VW Transporter T6.1 SE In Silver 2.9TDI 150PS. 7 Speed DSG Wheelchair accessible day vehicle.


With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.
August 22, 2014, 10:43:38 AM #5 Last Edit: August 22, 2014, 10:47:43 AM by insanitybeard
Base idle speed varies from engine to engine really, in the case of the Galaxy, an old databook I have suggests the petrol V6 idle is lower (about 700rpm) but the 2.3 petrol and TDI are similar at about 900rpm.
Always learning..... Often by mistakes!
August 22, 2014, 10:44:04 AM #6
And just guessing but would the faulty coolant temperature sensor make the temperature needle drop and rise randomly too?
August 22, 2014, 11:09:51 AM #7
Oh yes, common fault
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2023 VW Transporter T6.1 SE In Silver 2.9TDI 150PS. 7 Speed DSG Wheelchair accessible day vehicle.


With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.
August 22, 2014, 11:11:00 AM #8 Last Edit: August 22, 2014, 11:11:32 AM by siggieman30
Ok cool. It showed as a fault when I ran VCDS lite the other day too. If only I could find the damn sensor lol
August 22, 2014, 11:17:07 AM #9
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2023 VW Transporter T6.1 SE In Silver 2.9TDI 150PS. 7 Speed DSG Wheelchair accessible day vehicle.


With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.
August 22, 2014, 11:17:33 AM #10
Wicked stuff thanks chris
August 22, 2014, 11:21:50 AM #11
Guessing mine is going to be a 2 pin plug then mate
August 22, 2014, 01:29:02 PM #12
There are four pin versions depending on model but the grey one seems to be the usual one for early MK2's
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2023 VW Transporter T6.1 SE In Silver 2.9TDI 150PS. 7 Speed DSG Wheelchair accessible day vehicle.


With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.
August 22, 2014, 01:30:09 PM #13
Ok I'll have to have a look then I think
August 24, 2014, 11:05:12 AM #14
just a comment on idle revs
115auy engine was 903
current 140ps engine is 943

mechanic at vw could not specify a figure

Tony
August 24, 2014, 11:08:38 AM #15
Ok thank you
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