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Mike Edwards



Member Since: 13 Feb 2021
Location: Northampton
Posts: 223

United Kingdom 2013 Range Rover Vogue SE SDV8 Causeway Grey
Problems Starting...

Trying to track down a slow starting problem on my '03 TD6. It has to turn over for 10 seconds before it fires and once it idles it feels like is hunting with the revs going up and down a bit.

Using IID Tool suggests the Low Pressure Pump pressure is fairly stable but the Main Pump Pressure varies from 4100 psi t0 5100 psi, although usually between 4300 psi and 4700 psi.

I'm not sure if the Fuel Compensation for the different cylinders is relevant but cylinders 2, 3, 4, & 5 are around 655 mm3 whilst cylinders 1 & 6 is 2 mm3.

I'm guessing Fuel Pressure Regulator or Main Fuel Pressure Pump but would like to hear your suggestions.

Post #586057 3rd Mar 2021 3:38pm
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jim4244



Member Since: 31 May 2012
Location: UK
Posts: 843

England 2005 Range Rover Vogue Td6 Zambezi Silver

Hmmmm..... I wonder if it could be the in line fuel pump on its last legs?

Jim

Post #586059 3rd Mar 2021 3:39pm
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Mike Edwards



Member Since: 13 Feb 2021
Location: Northampton
Posts: 223

United Kingdom 2013 Range Rover Vogue SE SDV8 Causeway Grey

Is that the main fuel pump in the engine bay or the narrow long one next to the tank?

Post #586082 3rd Mar 2021 6:17pm
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jim4244



Member Since: 31 May 2012
Location: UK
Posts: 843

England 2005 Range Rover Vogue Td6 Zambezi Silver

It’s situated under the car in the vicinity of the rear near side passenger seat. There is a plastic cover held closed by 2 10mm bolts.

You should be able to hear it ticking with the ignition on.

Jim

Post #586091 3rd Mar 2021 6:43pm
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jim4244



Member Since: 31 May 2012
Location: UK
Posts: 843

England 2005 Range Rover Vogue Td6 Zambezi Silver

How did you get on Mike?

Jim

Post #586744 9th Mar 2021 8:59am
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Sam



Member Since: 02 Jun 2017
Location: West Sussex
Posts: 89

England 

As Jim's suggested, the lift pump (Primary pump) may well be on its way out. As the name suggests, the lift pump sucks the fuel out of the tank and delivers it to the high pressure pump. If the lift pump fails the high pressure pump has to do all the sucking as well as pressurising the fuel and delivering it to the injectors. Can take a lot of cranking to overcome this.
You can sometimes have a situation where the car won't restart for a couple of hours after a particular set of circumstances; car up to full temperature then switch off, then start again after a minute or two then switch off again, leave for five minute and then try and start it again. You'll often find it won't and it's usually because the lift pump has failed.
Let us know how you get on.

Post #586749 9th Mar 2021 9:19am
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Mike Edwards



Member Since: 13 Feb 2021
Location: Northampton
Posts: 223

United Kingdom 2013 Range Rover Vogue SE SDV8 Causeway Grey

Thanks for the advice. I'm finally going to try to pull the fuel pump out.

Any recommendations as to where I can send it to get it tested and rebuilt or should I buy an already refurbed/new one?

Post #589646 31st Mar 2021 10:57am
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