Vehicle & Technical > Defender

V8 Problem

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Sharpshooter:
My brothers just bought  1999 def 90, which has had a well known company fit a v8 to it. He says sometimes when he drives down the road, it will suddenly run rough like its running short of a few cylinders.

 When he stops and turns off the ignition for a few seconds, then starts, its fine for a couple of days and then it does it again.

He has changed the coil, plugs, leads and dizzy cap but it still does it.

I know your all gonna say take it back, but ive said that. Hes a funny [!Expletive Deleted!] when it comes to things like this so i wondered if anyone has any ideas. I think the engine is a 3.9 efi from a rangy. Cheers. :D

muddyweb:
Check the fuel filters, could be a fuel blockage...   Could also be a faulty fuel pump or connection.

Personally, I'd take it back to the garage and see what they have to say about it.

Sharpshooter:
Sorry forgot to mention, have tried fuel pump and changed filters. Is there a filter inthe tank. It was a Td5.??

hingmy:
is it still running the td5 tank/pump? I wonder if the pump is putting out insuffficient pressure for efi?

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