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BuddySpire



Member Since: 15 Oct 2018
Location: Sheffield
Posts: 27

United Kingdom 
2015 AB 4.4 cuts out when cold

Hi, 2015 AB 4.4 currently on 90k miles I bought it when it was on low 60’s. Been very reliable but last couple of weeks a few times on first starting up in a morning it fails to change up to second automatically, if I use the paddles it changes and then goes it to auto mode with no issues. The last 3 days however it has cut out when stopping or stationary in traffic the last time it took 4 attempts to restart and then went in to restricted performance. Stopped the car a mile down the road and it cleared the restricted performance when it restarted and drove perfectly the rest of day.

Any ideas on what causing the faults.

Thanks

Post #637989 27th Jul 2022 9:23pm
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GraemeS



Member Since: 06 Mar 2015
Location: Wagga area
Posts: 2487

Australia 2012 Range Rover Autobiography TDV8 Bournville

If you have access to a diagnostic tool that can graph engine rpm then graph rpm from before starting to idling to check that the rpm isn't momentarily dropping to zero which would indicate a faulty crankshaft position sensor. It's such an easy check that it should be the first action whenever chasing the cause of starting or low rpm faults.

Post #638014 27th Jul 2022 11:08pm
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Cam-Tech-Craig



Member Since: 03 Aug 2011
Location: Gloucestershire
Posts: 16294

England 2015 Range Rover SVAutobiography SDV8 Loire Blue

as stated, would just be a guessing game without diagnostics sir... Thumbs Up

Post #638020 27th Jul 2022 11:59pm
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BuddySpire



Member Since: 15 Oct 2018
Location: Sheffield
Posts: 27

United Kingdom 

Been to Indy this morning and the fault code when check against LR database along with symptoms is suggesting wiring fault on fuel pump registering too high a pressure. Parts are only £40 plus hour fitting so trying that first.

Forgot to take a note of code and service bulletin number will try when have work done next week.

Post #638039 28th Jul 2022 10:13am
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