Hi all, I need help / advice with my 2000 TD5 90.
The car has a Tunit box on it and when it gets to about 70mph the car seems to judder, as though running out of diesel, after a while the juddering dies down and the car will proceed to 80mph+.
I removed the Tunit and nothing seemed to be amiss so I quickly thought it was the Tunit Box.
I went to Bell Auto Services and they re-mapped my ECU to try and eliminate the Tunit Box...and they did, the re-mapping also produced the same problem.
Reverting the car to stock ECU with NO Tunit Box I went for an extended drive to see if I could feel the juddering. Whilst its not nearly as apparent I am sure I can feel it.
So the question really is whats the problem?!? I have been told that the fuel pumps are a common cause of failure on the TD5 and TD4 as they loose the ability to supply fuel at a constant pressure.
Also, what should the top speed of a stock TD5 90 be? Yesterday, mine seemed reluctant to go beyond 75mph, which I suspect is about 15mph -
20mph too slow.
I have recently serviced the vehicle (2000 miles ago), where all filter where changed.
...long shot but is there a filter on the pump inside the tank that could be blocked???
Thanks Jon