Hello Sanchi. I hope you have better luck with your can than I've had with mine. Reading the thread, there is some good stuff here.
Some observations, if I may.
A) There are 3 fuel pumps in an FL2. Pump 1 is an electric pump in the fuel tank. It passes fuel from the left tank, over the hump of the prop shaft and into the 'main' fuel tank. That is all it does. If you have a full tank of diesel this pump serves no purpose as fuel from both tanks can be drawn out and passed to the front of the car. Changing this pump is expensive as you need to hoist the car, remove the exhaust pipes, remove the prop shaft, and then remove the fuel tank etc. At the time my car broke down my tank was nearly full (80%), so the problem was not this pump, yet the changed it!
The second fuel pump is located to the right side ( gear box ) of the engine block, and is part of the High Pressure (HP) fuel pump, which is above it. Number 2 pump is an electrically operated lift pump which SUCKS the fuel from the fuel tank, under the car, and into the fuel filter, and onwards to low pressure side of the Main pump. The 3rd pump is the High Pressure Fuel Pump. which draws fuel from a small reservoir immediately below it , in the LIFT Pump part of the unit. High pressure fuel (300-1200 Atmospheres ) is then directed, through steel pipes to the Common Rail. The HP Pump is mechanically driven by the exhaust Cam Shaft. The Common Rail has a three pin Pressure sensor on the left end, and a two pin Pressure release valve on the other end ( near to the HP pump). Both Sensors /Valve must be working properly.
B) Note that the crank position sensor is located at the bottom of the engine. To change this £10 item, one must remove the RHS front wheel, and remove two of the wheel arch panels behind the wheel space, and you will find it to the left of the crank shaft pulley. Not to be confused with the Cam Shaft Position Sensor, located at the top of the engine (Exhaust Cam), to the left of the Common rail.
C) It is my understanding that there are two ways ( or maybe more) to deal with the ECU. One, is to purchase a new ECU ($$$$) and have is re programmed to your car by Land Rover ( for Keys, Fuel Injectors, VIN, and vehicle specification etc), This is expensive. The second way is to buy a used ECU ( with exactly the same part number) and have it cloned by a specialist. It is important to have the Key accepted by the new or cloned ECU or it may not accept your key .... and immobilise the car.
Hope this helps, and good luck.
Richard
Some of this information is inaccurate.
There are 3 fuel pumps.
The tank pump is electric, and as you correctly said, only pumps fuel from the LH side of the tank to the RH side, simply to prevent fuel stagnation and to get the fuel over the tank centre hump when the level is too low for it to travel over the hump by itself.
If the gauge is showing over ¼ or there abouts, then fuel will be drawn from the tank.
Pump 2 is a mechanical lift pump, which is part of the high pressure pump assembly. This lift pump will draw a good strong vacuum on the fuel line, so the high pressure pump gets plenty of fuel. There is an ECM controlled fuel volume control valve mounted on the HP fuel pump assembly, which passes excess fuel back to the fuel filter return line, for recycling (temperature depending) or returning to the tank.
Pump 3 is also mechanical, and is the high pressure pump. This gets fuel from the LP section of the pump assembly, and boosts the pressure up to 150,000kPa passing it to the fuel rail.
The mechanical lift pump and HP pump are driven by the exhaust camshaft.
There's no electric pump, other than the transfer pump in the tank.
The fuel rail contains a rail pressure sensor on the timing belt end, and a pressure control valve on the gearbox end. The rail sensor sends pressure values to the ECM for processing. The pressure control valve is under ECM control, and works in tandem with the fuel volume control valve described above, to maintain tight control on fuel pressure, regardless of engine speed or fuel temperature.
The fuel injector leak off pipes are unusual in they are pressurised to 10 Bar (145 PSI), by the pressure control valve in the return line to the filter. The injectors won't work if there's low pressure in the leak off pipe line.
The crank sensor is at the bottom of the engine, and is easily changed. There's no need to remove the wheel, just the splash shield needs moving aside. This job is easily done at the side of the road in under 10 minutes, I know, I've done it, twice.
You can have LR replace an ECM (they seldom go wrong) with a new one, but this is unnecessary, and very expensive.
A second hand ECM can be configured to the vehicle using a cloned cope of JLR SDD, and a Mongoose lead, or by an LR specialist using a genuine copy JLR SDD.
There's no need to have the ECM cloned, as LR's own software will configure new and second hand ECMs in just a few minutes.
