Hi my tdv8 has a massive lag when driven or even when revved on the spot.
I have noticed it is much more responsive on the throttle, being revved in neutral with the electric handbrake off and in low range than in high range, can anyone confirm this is the same on theirs?
Its like some sort of torque limiter and I was wondering if its a software issue. Just to note it is worse then ever with the handbrake on! Cheers all.

Check you intercooler hoses, plenty of info on how to in the wiki. The top ones need to come off and be thoroughly checked.

I can’t quite see what you are getting at with the revving up?

So if you basically sit with it in, special programs off, high range, neutral, left foot on the brake and hand brake off... - it revs up ok?
If you then just put the hand brake on but still in neutral - it won’t Rev as well and feels laggy. This shouldn’t make a difference by the way.


Double check you have the special programmes turned off. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6

Yeah, as above. First initial knee jerk thoughts are some sort of throttle mapping issue. Not sure how hand brake should affect it though......

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

Thanks for the reply, I have recorded what happens, it really does seem like a throttle map issue. Almost like a restricted performance mode. No fault codes, no boost leaks, checked with a kit. Egrs are blanked and mapped out.
Live data all seems to check ok and equal on the air flow and map pressure.
I will post the video on you tube and post the link. Many thanks again guys.

https://youtube.com/shorts/dhOuixISjqY?feature=share

You tube video of the problem.
Any help appreciated. Cheers.

mjdronfield wrote:

Yeah, as above. First initial knee jerk thoughts are some sort of throttle mapping issue. Not sure how hand brake should affect it though......