I've noticed that my Range Rover doesn't start the same way as it used to. Lately it has been taking a few seconds of starter motor whirring before it fires, but it used to fire almost instantaneously (had to spell check that one!). I thought it could have been a filter being slow pulling the fuel up, but it seems to take the same length of time to start if it is turned off and started again within seconds as if it is turned off and left for hours.
One of my contacts suggested that it may be a pump problem (sounds expensive) but it does start every time, performs pretty well and there are no misses or cutting out. Any ideas or similar experiences??

Sir_Ben said:

I've noticed that my Range Rover doesn't start the same way as it used to. Lately it has been taking a few seconds of starter motor whirring before it fires, but it used to fire almost instantaneously (had to spell check that one!). I thought it could have been a filter being slow pulling the fuel up, but it seems to take the same length of time to start if it is turned off and started again within seconds as if it is turned off and left for hours.
One of my contacts suggested that it may be a pump problem (sounds expensive) but it does start every time, performs pretty well and there are no misses or cutting out. Any ideas or similar experiences??

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Is it not fuel injection, listen for the fuel pump prime the system, does it not run for a second or so then stop when the pressures up

What about the crankshaft sensor.

Plug leads, but it runs fine you said, crank it when its dark and see if you can see or hear it tracking under the bonnet.

Oops! Sorry, but I missed the most obvious bit of info needed. It's the 3 litre diesel engine. Duuuuuh, my brain hurts!!

Sir_Ben said:

Oops! Sorry, but I missed the most obvious bit of info needed. It's the 3 litre diesel engine. Duuuuuh, my brain hurts!!

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Do the easy thing first then, change the fuel filter, might be full of **** or allowing the fuel to leak back. I would imagine, and Its a guess, that it has a fuel rail with a mechanical pump to pressure it.

Make sure you have no leaks anywhere after the filter, even a slight one will allow the system to lose pressure, however you say it does this after you switch off and try a restart, so it would make me think that it is a sensor, but the filter is a first port of call.

The crankshaft sensor needs two or three turns of the engine before it recognises the engine is trying to start, if it has one and I dont know, then it could be on it's way out.

You need to get it on a pooter

Sorry to be so general but I'm not familiar with what system you have.