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Thanks for all your comments. First step is to have it diagnosed by my local LR specialist and have him take a look for anything odd. And I will check the previous owner for some extra info... To be continued

I read that there was an upgraded version of the ECU for the 2.5DSE which was initiated after mid 1998. Mine is from June 1998, so I think originally it has the 7300 and it was later fitted with the upgraded (7301) and that causes issues.

From the battery, so starting with the (black) plug that connects directly on the metal colored ECU. I know that there are several plugs that are not universal. The original that I have does not fit the current (7301).

Problem occurs with empty and full tank

Thanks for the replies. I suspect the ECU, but not 100% sure. Reason that I think it is the ECU is that the previous owner mentioned this as the cause for the dips in RPM (which now got worse, but same type of issue). So I assume that the issue was not there at all before the ECU was...

7113 is 7112!

Hello there! I own a P38 with a 2.5 diesel. It is from June ‘98. Automatic gearbox. When I bought it last year, the previous owner told me that the occasional dip in rpm that was present, is caused by the fact that it had an upgraded ECU. As the upgrade results in more torque and the dip in...