Whilst on my travels I found that the EGR (Exhaust Gas Recirculation Valve) vacuum pipe (which I had pulled off and blocked), had perished. I cut it shorter and blocked it off again.
Right so far so good.
But now after a couple of mins on tickover I get a loud buzzing noise from that area. I don't know if the noise was there before. I don't recall it!
It sounds like a childs toy car or robot in which the gears have stopped and the motor is just spinning the drive cog against the rest!
It goes as soon as I blip the throttle them returns after a min or so.
Wondered if anyone knows what it might be and whether it needs attention please.
Many thanks in advance guys/gals.