Discovery 4.0V8

Hi you might want to check the fuel filter or put a good valve cleaner in the tank.Techron or landrover fuel cleaner.

The same has happened to my 98 Disco I.

1. I went through the Premium gas routine, the fuel additives to clean the injectors which helped some, I think. (Greased Lightning, 12000 mile cleaner)
2. Used oil additives that affect the valves. (Greased Lightning with Dupont ptfe).

The guy at Advance Auto said it seemed like a vacuum problem. So one afternoon, after driving the Rover until it was warm, I lifted the hood and stood there staring at it. Not being much of a mechanic, I was apprehensive about touching the Rover and would wait until I got it to a dealer. So, I squeezed the two hoses coming out of the valve covers, the breather hoses and WHOA! the rubber hose collapsed like bubble gum, sticky like bubble gum.

I immediately ripped them out of the engine and not having genuine parts, I peicemealed the passenger side hose together and placed a 1/2 inch hose on the driver side. Then I took it out for a drive.

I have yet to have any more hesitation (2 weeks). Is this the answer? Dunno. But so far it has worked for me.

Mark