My Range rover sport TDV6 engine missfire

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ratmanrover

Member
Posts
77
Hi
Does anyone have any knowledge on the landy TDV6 engine. Quite simply its lost a cylinder (no td5 jokes here please :)). is there any common faults? its not injector as this has been on a computer. I guess its a head off job to check valves, bore, rings, piston? is there any simple checks i can do before the strip down? all help much appreciated. as not selling it but need to fix relatively cheaply due to a new addition to the population on the way :)
 
ratmanrover said:
Hi
Does anyone have any knowledge on the landy TDV6 engine. Quite simply its lost a cylinder (no td5 jokes here please :)). is there any common faults? its not injector as this has been on a computer. I guess its a head off job to check valves, bore, rings, piston? is there any simple checks i can do before the strip down? all help much appreciated. as not selling it but need to fix relatively cheaply due to a new addition to the population on the way :)
Click to expand...

Exactly the same thing has happened to my brother's S-type Jag (same engine) - haven't got to the bottom of it yet.
 
Last edited:
Same isseu overhere
Did a compression check and a cylinderl eak test. All good
Now change the flywheel and clutch that can be the problem.
All injectors where fine also only the clutch wasn't working as it shoot be.
 
Diagnostic will show a cylinder imbalance concern and it will show the cylinder number too, so you don't have to guess which cylinder is down. Gould you also give a bit more info leading up to the misfire, these engines are very robust.
So you are saying there is no faults logged what so ever?
If you are going to do a compression test and going to remove the glow plugs to do this.....PLEASE BE CAREFUL THEY ARE VERY FRAGILE, and need lots of feel, pre penetrating lube to assist with removal.
 
As said a diagnostic check will show by injector compensation values which cylinder/s are not making progress.Do not try to do a compression test via the glow plugs,find someone with an oscilloscope to do an electronic compression test using an inductive clamp on the main battery lead.
If a cylinder is down on compression the injection compensation will have a high positive reading,this will then be confirmed by the scope showing less current being taken by the starter as that cylinder comes onto the compression stroke.
Its quick,easy and conclusive - best of all you don't need to take anything apart or even get your hands dirty....
 
eightinavee said:
As said a diagnostic check will show by injector compensation values which cylinder/s are not making progress.Do not try to do a compression test via the glow plugs,find someone with an oscilloscope to do an electronic compression test using an inductive clamp on the main battery lead.
If a cylinder is down on compression the injection compensation will have a high positive reading,this will then be confirmed by the scope showing less current being taken by the starter as that cylinder comes onto the compression stroke.
Its quick,easy and conclusive - best of all you don't need to take anything apart or even get your hands dirty....
Click to expand...
Now that's a good idea and something new that I have learnt, thanks eightinavee.
 
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