I have a problem with my RRS 4.2 S/C. If i drive the car hard, footing it full, the car will only rev to 5k rpm or sometimes 4.5k rpm and then misfire. I then have to change gear. Im sure it was not like this when i first purchased it. It does this in auto mode as well as manual (commandshift mode). I have placed the car on the diagnostic machine and it has come up with no faults

How many miles? Gone - 2008 Stornoway Grey RRS 2.7 TDV6
Gone - 2009 Buckingham Blue RRS 2.7 TDV6
Gone - 2010 Alaska White RRS 5.0 V8 Aspirated
Gone - 2017 Chawton White RRS 5.0 V8 Supercharged
Current - 2010 Java Black RRS 5.0 V8 Aspirated
Current- 2024 RRS P400 SE Dynamic

59k

Someone I know had something similar and it was dirty fuel related according the the dealer. I don't know if you have had your car from new so I don't know how careful a previous owner (if any) may have been. Anyway in his case some fuel system cleaning and (can't remember exactly)a filter change fixed it. Gone - 2008 Stornoway Grey RRS 2.7 TDV6
Gone - 2009 Buckingham Blue RRS 2.7 TDV6
Gone - 2010 Alaska White RRS 5.0 V8 Aspirated
Gone - 2017 Chawton White RRS 5.0 V8 Supercharged
Current - 2010 Java Black RRS 5.0 V8 Aspirated
Current- 2024 RRS P400 SE Dynamic

i'v been reading around and apparantely the problem is pretty common on the 4,2 s/c. There is a TSB on these vehicles with regards to the supercharger coolant pump (Part no PEP500010). When the cars were manufactured, the electric water pump has to connections (positve and negative). The wires were installed the wrong way, causing the pump to operate incorrectly. Now the tsb states the wires have to be swapped around and the pump has to be changed. Are TSB's recalls? Are they covered by the dealer even if warranty has expired? I have checked my vehicle and the wires are the wrong way round. (fault code P2601 comes when eventually)

http://rangerovers.net/forum/viewtopic.php...mp;start=7

A TSB is a Technical Service Bulletin and they are supposed to keep the dealership techies up-to-date with all the latest faults and how to fix them........................ except it appears that while many service managers know about them the man on the shop floor often doesn't and often members on here know more about them than the service managers! 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW