Hi all, I've noticed my l322 5.0sc is occasionally cranking a long time before starting, I guess it's doing this once every 20-25 times I start it.
It does start but normally it starts quickly just after a few turns. Is this a sign of an impending failure of ignition component or fuel issue? It's had new plugs, Oil and filter and injector cleaner which use occasionally as it runs a Prins lpg system, it's only done it 5 or 6 times I guess but concerned it could be a sign of a developing problem?
Engine has never missed a beat in the 50,000 or so that I've had it.
Has anyone had a similar experience/problem? Current 5.0 S/C Autobiography LPG
110 HCPU V8
Previous:
P38 first ref LR1
101 Forward Control
90 CSW V8
110 CSW V8

Have the LPG injectors been serviced recently?
It’s quite a common issue that as the LPG system is still pressurised when the engine stops, if you’ve got an injector starting to leak then it “floods” the manifold causing the problem you’re seeing.

What cass said will most likely be the issue, once the temperature drops and no sun on the bonnet, it'll probably dissappear....

I had a similar issue on my 4.2. It wasn't an LPG injector leaking though, it was the LPG reducer. The diaphragm inside the reducer had failed so it was filling the vacuum line and inlet manifold with LPG when the car was switched off so it had to crank for a long time before starting.

If I ran it solely on petrol the issue didn't happen so might be worth leaving yours off LPG for a while to see if the issue stops.

David. 2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2012 Range Rover 5.0 SC Autobiography in Indus Silver with Jet/Ivory Interior
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior
2013 Range Rover Sport SDV6 HSE Black Edition in Santorini Black with Ebony Interior

Thanks for the advice everyone, I will have a look through the lpg system and get the injectors serviced, I know the vapour and liquid filters were changed a while back but I'm pretty sure the injectors were not serviced.
I will run it on petrol for a while as suggested and see and in the meantime get them serviced.

Thanks, very much appreciated. Current 5.0 S/C Autobiography LPG
110 HCPU V8
Previous:
P38 first ref LR1
101 Forward Control
90 CSW V8
110 CSW V8