Good afternoon

Recently my Discovery series 2 TD5 automatic from July 2000, started to develop a problem that our garage here in France (Tarn) has thus far not been able to diagnose. His diagnosing equipment, he tried three different ones, do not see all of the car's systems. When starting occasionally, i.e. not always, the engine starts to vibrate intensely and the gas pedal does not appear to respond when pressed. When it does not vibrate, the car responds normally to pressing the gas pedal and one can drive with it. Never had this problem before, and it started all of a sudden a few weeks after it had been sitting outside in winter under a cover. Would anybody have an idea what could be the matter and what part is worth trying to replace ? I have a short video of the engine doing the weird vibrating, is it a timing issue, fuel injection issue ? But landyzone does not allow me to upload it, probably size of file I imagine.

Many thanks as always for any suggestions.

Hi, that's not something to be diagnosed without watching live data while it happens or it can become very expensive to replace parts based on guesses .... though next time when it happens unplug the throttle pedal's connector and if it goes back to normal idle then replace it, i've never unplugged one with engine running so i dont know exactly if it will idle or stop completely, if it stops this test is irrelevant, also check the ECU red plug, if it's oil replace the injector loom... for any other issue a capable diagnostic tool is needed handled by somebody who knows Td5s... i doubt that a timing issue would be intermittent, ... can't help you more sorry

Thank you !

Hi, I am in the Tarn, (Mazamet) where are you?
I too have a 2000 TD5 disco auto and have my Foxwell (diagnostic) with me which may be of some use. Not as good as a Nanocom but a lot better than nothing! and I speak French.
I just hope you aren't too far away. I also know a guy who may be able to help in Labastide-Rouairoux. He is Dutch and your name implies this!
Message me if I can be of any help.
Stan.

Just realised we have had a discussion before about a front bumper so I now remember you live in Cordes. and you already know Rob!

Can't help with the vibration but low battery volts can cause no throttle response, ask me how I know
Also as you say it's been under cover for a while did the battery go flat?

Thanks All, battery is new, replaced 2 months ago or so. Stanley thanks I remember now. But not Rob, I went to Onno then. Now with my regular garage between Cordes and Albi who is very capable. I contacted Famous Four as well where I used to get my parts before Brexhit and they confirmed Sierrafery's advice that a good place to start and a very common problem is the injector loom, then the fuel filter and thirdly possibly the cable of the throttle. Since the loom has never been replaced in 24 years, I plan to start with this. I also saw that Paddock in a YouTube video confirmed it is a very common problem with the TD5 engine and they sell a lot of them and even show how to do it yourself (not going to this time). I will keep you posted. Spouse wants me to get rid of it for years now and if this can not be fixed it needs to go. Well maintained always, used well, and owned for 24 years since I bought it .

helmuth van es said:

Thanks All, battery is new, replaced 2 months ago or so. Stanley thanks I remember now. But not Rob, I went to Onno then. Now with my regular garage between Cordes and Albi who is very capable. I contacted Famous Four as well where I used to get my parts before Brexhit and they confirmed Sierrafery's advice that a good place to start and a very common problem is the injector loom, then the fuel filter and thirdly possibly the cable of the throttle. Since the loom has never been replaced in 24 years, I plan to start with this. I also saw that Paddock in a YouTube video confirmed it is a very common problem with the TD5 engine and they sell a lot of them and even show how to do it yourself (not going to this time). I will keep you posted. Spouse wants me to get rid of it for years now and if this can not be fixed it needs to go. Well maintained always, used well, and owned for 24 years since I bought it .

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Rob is the (Dutch) Landy breaker in Labastide-Rouairoux. You contacted him about a new front valance and he quoted you €500.
We still don't know how you sorted that problem out in the end! Unless you used "Onno" whoever they are! Cordes and Albi are further away than we visit regularly.
If the injector loom IS the problem then, just to get you going at least for a short while, you could remove the plugs from the ECU and clean them, the orange one will have oil in it. There may also be oil actually inside the ECU. Not impossible to open it up and carefully clean it out, even if all you do is drain it and wipe it.
I replaced my loom ages ago, it continues to leak oil into the orange plug, I just clean it out from time to time.
But none of the above accounts for the intermittent nature of the problem.
Have you changed any of the sensors since you got the car? MAP/IAT for instance? My car started misbehaving and was transformed by changing that.
Anyway, best of luck.