Member Since: 05 Apr 2008
Location: Scotland
Posts: 236
10 second acceleration delay
Hi Folks
SDV6 2013 - From cold start up put car in D foot to the floor car just crawls for 10 seconds then builds up speed. Once warmed up it gets a bit better say 5 seconds before picking up speed.
What could be the potential cause?
No warnings on dash will cruise up to 70 etc bit baffled. Never had issue like this before and had car from new only got 60k on clock.
Any help greatly appreciated.
Thanks
26th Sep 2024 7:35 pm
LRD4GAB
Member Since: 05 Nov 2020
Location: Tamworth
Posts: 499
Normal I think mine did that until I had it remapped
Check your shoe isn't catching the brake pedal. Only needs the merest of touches and car prioritises braking over acceleration..
Dean
====================================
2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms
27th Sep 2024 12:19 pm
Weyboat
Member Since: 13 Apr 2018
Location: Weymouth
Posts: 273
Check the oil level in your gearbox, it could be low on oil causing the torque converter to slip, as the oil warms up it expands and this is why the torque converter performance improves as the oil warms up.Gone 2016 Landmark D4
Current 2015 HSE D4 - AKA - 'Gandalf the Grey'
27th Sep 2024 7:04 pm
Khauff
Member Since: 05 Apr 2008
Location: Scotland
Posts: 236
Hardware wrote:
Check your shoe isn't catching the brake pedal. Only needs the merest of touches and car prioritises braking over acceleration.
Checked that and defo not the size 9’s
2nd Oct 2024 7:58 am
Khauff
Member Since: 05 Apr 2008
Location: Scotland
Posts: 236
Weyboat wrote:
Check the oil level in your gearbox, it could be low on oil causing the torque converter to slip, as the oil warms up it expands and this is why the torque converter performance improves as the oil warms up.
Very true had transmission serviced from LR dealer 2 years ago and it’s been fine with no leaks. Could get another garage to recheck.
2nd Oct 2024 8:00 am
Khauff
Member Since: 05 Apr 2008
Location: Scotland
Posts: 236
In neutral when I push on the accelerator pedal instant rpm rev up.
It drive nothing until 10 seconds so it could be transmission but with the d4 being so technical with sensors nothing flagged up on dash.
2nd Oct 2024 8:02 am
Weyboat
Member Since: 13 Apr 2018
Location: Weymouth
Posts: 273
If the problem is less acute when the engine and gearbox has warmed up, then I would be checking the gearbox oil level with the engine running.
There should be a trickle of oil running from the oil level plug, if not add the correct spec transmission oil until it does start to trickle.
The oil should be at a certain temperature when checking, I think it should be between 30 and 50 degrees C.
Make sure the car is parked on level ground when checking the oil level.
See the image for the relevant procedure for checking the oil level, this was taken from 'Robbies Guide to ZF8 Auto Transmission Oil Change'
Gone 2016 Landmark D4
Current 2015 HSE D4 - AKA - 'Gandalf the Grey'
2nd Oct 2024 8:18 am
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8223
Highly likely they didn't do the engine running process when it was changed, surprisingly it takes a fair amount of oil once the engine is started.It can when others can't,
It will when others won't,
It goes where others don't.
2nd Oct 2024 3:39 pm
Khauff
Member Since: 05 Apr 2008
Location: Scotland
Posts: 236
Appreciate support and comments.
Restricted performance flagged up on way to garage this morning.
Click image to enlarge
Garage has updated, turbos on way out as too much oil in top intercooler hose. Oil level still showing full when I check digitally, no black/white/blue smoke through the rev range car still pulls like a train apart from 0-20mph
Maf sensor in middle of engine was caked with oil crud which the garage cleaned out.
Carried out smoke test all clear and plastic intakes have no fracture.
Air filter was all clean no trace off oil.
Click image to enlarge
This too much oil folks before I start shelling out on new turbos £££ ? And would this be the cause of the car not willing to build up any speed first start up in the mornings?
Thanks
3rd Oct 2024 2:07 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8223
I once had this symptom on a Mercedes, it was the inlet manifold!It can when others can't,
It will when others won't,
It goes where others don't.
3rd Oct 2024 2:59 pm
Weyboat
Member Since: 13 Apr 2018
Location: Weymouth
Posts: 273
Khauff wrote:
Click image to enlarge
This too much oil folks before I start shelling out on new turbos £££ ? And would this be the cause of the car not willing to build up any speed first start up in the mornings?
Thanks
No it is not too much oil, it is normal to find oil in that hose.
The sensor that was cleaned by the garage is the MAP sensor and it measures air pressure in the manifolds, not air flow.
Did the garage check the oil level in the gearbox (with the engine running)?Gone 2016 Landmark D4
Current 2015 HSE D4 - AKA - 'Gandalf the Grey'
3rd Oct 2024 3:35 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8223
How do you check gb oil level digitally?- it can only be done as described above!- level ground, take filler plug off and fill WITH CORRECT SPECIFICATION OIL AT HAND TEMPERATURE UNTIL IT TRICKLES OUT.
The volume of oil increases tremendously as it gets hot and it gets hot very fast even whilst filling, my thoughts are the oil level is low but in the 0 to 20 mph it increases sufficiently to give you drive.
My inlet hose has oil in it same as in the photo and I don’t have any problems, also as I understand the turbo only becomes active at approximately 1250rpm.
Does the engine rev normally when in park?It can when others can't,
It will when others won't,
It goes where others don't.
4th Oct 2024 7:44 am
Khauff
Member Since: 05 Apr 2008
Location: Scotland
Posts: 236
Weyboat wrote:
Khauff wrote:
Click image to enlarge
This too much oil folks before I start shelling out on new turbos £££ ? And would this be the cause of the car not willing to build up any speed first start up in the mornings?
Thanks
No it is not too much oil, it is normal to find oil in that hose.
The sensor that was cleaned by the garage is the MAP sensor and it measures air pressure in the manifolds, not air flow.
Did the garage check the oil level in the gearbox (with the engine running)?
Garage mentioned no fault codes stored with gearbox so they parked that suggestion and focused on the stored restricted performance fault which pinged up on route to garage.
4th Oct 2024 4:24 pm
Khauff
Member Since: 05 Apr 2008
Location: Scotland
Posts: 236
M3DPO wrote:
How do you check gb oil level digitally?- it can only be done as described above!- level ground, take filler plug off and fill WITH CORRECT SPECIFICATION OIL AT HAND TEMPERATURE UNTIL IT TRICKLES OUT.
The volume of oil increases tremendously as it gets hot and it gets hot very fast even whilst filling, my thoughts are the oil level is low but in the 0 to 20 mph it increases sufficiently to give you drive.
My inlet hose has oil in it same as in the photo and I don’t have any problems, also as I understand the turbo only becomes active at approximately 1250rpm.
Does the engine rev normally when in park?
Sorry should have been clearer, when garage mentioned turbos sucking too much oil into the top hose for their liking. I decided to check engine oil level as this should have dropped but was still showing full which I was happy to see.
Engine revs perfectly when in neutral and I don’t think it’s the turbos personally. Gearbox oil not filled correctly is also what I am thinking even though it was a LR dealer who carried out the work 2 years ago and only driven car 6,000 odd miles in that two years.
Got it booked into Mikey to work his magic as I know the vehicle will be in safe hands and I can sleep better at night
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