Juddering TD6.

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P Carr

New Member
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80
I have a 2003 TD6 and sometimes when stopping or moving of very slowly the car seems to judder a little. I dont think its the brakes as I somtimes feel when moving off slowly. The cars done 60K.
 
A quick thought: are you running 19 or 20 inch wheels? There is a thread already about them being unsuitable for the diesels.
 
I have genuine Range Rover 20" alloys which have a 50 profile tire which is more than many of the replica's. It only does this sometimes so cannot see why it would be off the wheels. Also I have had the wheels on for about 8 months and it has only recently started to do it.
 
Try putting `range rover vibration` in search box. Should take you to thread about 20" wheels on diesels. Seems the factory does not offer them as an option on diesels, only petrol models. I have no personal experience of this but hope this puts you in the right direction.
 
I never take the car off road to get any mud build up. It feels more like the engine is hunting as sometimes when idleing it does not seem as smooth as it should. Nothing showing on rev counter. The juddering when moving can only be explained as if discs were warped however you do not have to use brakes to feel it. Also somtimes all is fine???
 
Hi, i had exactly the same problem on my 03 TD6 last month. First thing in the morning the motor would be fine other than a puff of blue smoke on startup which smelt of diesel.
Then if you reved it to over 3500rpm when the motor came to a halt in gear there would a slight shudder as you pulled away, worse in reverse. Looking at the engine idleing you can see the engine rock a little on the mountings and revving it in neutral produced a slight flat spot, the same feeling as a dodgy spark plug on a petrol motor.
The cause is an injector breaking down, dont bother getting the return flow rates checked as that can be misleading, just pull the injector plugs off one at a time when the vehicle is exhibiting the fault. There will be a definite fall in tickover speed on the good injectors and much less with the suspect one.
Replacement is dead easy but you will need to manufacture a slide/back hammer and drill and tap the top of the old injector to take the slide adaptor.
 
The injector sounds more like the problem. Would some injector cleaner not do the trick. If yes what would you recommend?? The car has done 60K.
 
You can try some cleaner, can't hurt, made no diference to mine though. Any of the well known names should be ok wynns, millers etc. My injector failed at 68k, it will progressively get worse until the flat spot makes the whole car shake at low revs. If you've got the tools, changing it only takes a couple of hours, less if it's No1 injector as you don't need to take the inlet manifold off. Injector will set you back over £200, less from ebay if you can find any. You can get them reconditioned I think.
 
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