Well, the new lift pump made no improvement. :( Could it be an injector fault? Maybe the main pump? They're pricey items, so I'm reluctant to diagnose by ruling them out.

Thanks. I've ordered a new one.

I've a Defender with a 200TDi Discovery engine. It runs smoothly most of the time, but it suddenly developed a heavy misfire under load. It feels like fuel starvation - heavy vibrations - but it can be driven through by dropping down a gear. It's worse when towing on a motorway. I've changed...

I can’t see a purple relay. Would it be behind the instrument panel?

(First, apologies for being a newbie. I've been on this forum before, but can't remember my login details.) I've started fitting a Wipac LED kit to my 1987 Hi-Cap. I started with the sidelights, which work absolutely fine on one side. The other side is fine on sidelights or main beam, but the...