Sounds a bit like the injector wiring harness playing up!My Disco developed a misfire about 4-5 weeks ago we took it to Total 4x4, they put the electronic box on and it showed low fuel line pressure so they changed the pump. The Misfire returned and we took it to an Independent land rover repair shop they checked it out and it didnt show any thing. We went out on Sunday and it ran fine for about 7 miles we parked up went in to a shop came out started the engine and it felt like it was running on 4 cylinders. Its going back to the land rover dealers on Wednesday but we have been informed it could be the injectors that are faulty.
Its very strange it runs fine for 10 15 miles then just starts missing other times it runs rough as soon as it is started.
Can you change single injectors on the TD5
can any body advise cost of injectors for a 1999 TD5 and ECU unit
thanks
Had same problem seems to only run on 4 cylinders sounded like the engine was about to give up ,was ok a couple of times for about 8 mile then back to problem, garage showed injector 5 problem on test terminal,said £300 each for injectors.He contacted a few of his mates in the trade and some had seen same problem before,replaced loom from injectors to ECU and it runs perfect.There looked nothing wrong with it so do not be decieved.Good honest garage i say.As he said, he or his freinds had not replaced an injector on a TD5 before and as they are order only they can not sell many,but the loom was "off the shelf" at £45 (plus gasket set £20) still a hell of a saving.