Thread: Strange behaviour

Originally Posted by geoz

Hi Guys,

my Disco (TD5 Auto) has developed some strange behaviour.
When I apply the accelerator to approx 50% everything is fine, however, if I really step on it the engine behaves as if someone would jump on & off the accelerator at 1 sec intervals. Same if cruise control is enabled.

I checked the wire harness and there is very little oil in at the ECU, which is odd because before the wires go into the connector that goes into the ECU the cables split up (no harness), so I am not sure how the oil travels there. Inside the wires?

One more thing, although it may not be related: the car started doing this yesterday, while driven in the wet.

Any idea what could cause this?

Thanks

Georgie

Gday,

Firstly, where are you located?

Sydney, you think that causes the problem?

Originally Posted by geoz

Sydney, you think that causes the problem?

That will be the main problem

on the off chance, work out the throttle position required to cause the fault then chuck it in low range and see if the throttle position changes.
If it does it at the same RPMs but different throttle position oil in the harness is the main culprit

If it does it at different RPM but the throttle position remains the same then its the TPS.

I'm pretty sure overboosting does this also.

Hi Georgie,

Check the throttle pot. If there are problems with it, it throws an error code which your local LR service person can diagnose.

Mine did similar, & this was the problem. Has been perfect since.

I had something similar happen to mine a few years ago,check the hose that controls the turbo waste gate as slunnie said over boost will cause this sympton there is two hoses on this circuit one from the that goes to the control valve and the other one that goes to the waste gate soleniod.

There is also another sensor on the inlet manifold chech that the plug is not loose.

Thanks for the suggestions so far, will try to get a better understanding tomorrow.

I forgot to say: when I leave the accelerator floored the engine will rev up, but in a kind of staggered way. May provide a further clue.

Georgie