Hi,

I bought a 93 Disco 1 3.5L EFI (Engine serial portion KA048922)a few years ago and it's now taking about 10 seconds of turning over to start. Parts here on Borneo are pretty much non-existent so I need to order everything from Britain and have it shipped over here. Shipping is ridiculously expensive so trying to get everything I need in a single order. My mechanic says I should consider replacing these 3 sensors (pics included) on/near the Plenum Chamber during a tune up. Can anyone identify the parts in question and/or their part number? I'm only finding 3.9 engine views and not sure if the parts are the same. Can anyone also tell me if there's any way to test these units to see if they're still ok or are indeed faulty?

Many thanks!




Parts Location on Plenum Chamber