Hi,
My 96 disco 300tdi manual is feeling very sluggish again.
It was very sluggish a while ago and someone gave me some "engine cleaner" spray to make it faster (which doesn't work incidentally!!) which you spray into the air inlet after the filter while revving the engine. I noticed that it was actually coming out of one of the hoses and going all over the show. I tracked the hose down to the be one to the intercooler radiated which had a gaping hole in it. I replaced the hose and things were better for a while.
However, it's going really slow again now (0-60 takes about 30secs). I've replaced all the filters including fuel and changed the oil. Not much difference. On a straight motorway, it struggles to get past 70mph with my foot hard on the floor, although after time it will make it to about 88ish.
Occassionally it seems to be quite fast at accelerating, but minutes later it can be slow again. It seems to be faster for about the first minute or so after a cold start in the morning - very strange!!
Anybody have any ideas what might be causing this? A clogged intercooler radiator? Having to floor out the car just to accelerate to 30mph at an acceptable speed is keeping my fuel economy in the low 20s!
I know someone with a 300tdi auto, and compared to mine his is like a 911!