Question for Landy Buffs, intermittant rough running

Hugh Jardon · 17 May 2006, 09:08

i have a td5 es and every now and then it will run rough and sounds like it is running on 4 or 3 cyls. other times it will be ok

has anyone got any ideas on this?

springtide66 · 17 May 2006, 09:26

Hi
I had a problem like that on 99 disco td5. It was the tube to the turbo (approx 3" dia) delaminating inside and blocking the airflow.

I had nothing but trouble with the thing and wouldnt touch another!!

New engine & turbo @ 47K miles with full LRSH !!!

Hugh Jardon · 17 May 2006, 11:51

it runs rough at idle and that is when it is most noticible, sometimes ok then sometimes running rough. hopefully cod has the answer on this

DGR · 17 May 2006, 12:23

Ours (TD5 XS) had something similar when it was about 6 months old - it was also the turbo tube - I assume delaminating, but the dealer was quite cagey about why it was misbehaving.

It wasn't really that noticeable at idle - but under load/speed it would sometimes falter, or miss - on the motorway it felt like we were going through deep puddles when we weren't.

It was replaced, and it's been fine since.

D...

Hugh Jardon · 17 May 2006, 12:58

ours is most noticable at idle as it will sometimes rock the car

codprawn · 17 May 2006, 15:26

Could be blocked injectors - try a load of diesel cleaning stuff.

Richard B · 17 May 2006, 16:01

OK I'm no Landy buff, but isn't that (diesel cleaning stuff) bad practise for a modern diesel engine? Aren't injectors supposed to be self cleaning? And isn't the first sign of dirty or blocked injectors black exhaust smoke?

As a modern diesel like the Land Rover Storm engine is electronically controlled, perhaps there's the possibility this is an intermittent electrical problem?

ADS · 17 May 2006, 16:08

Chris, I would take it to the dealer or a Landrover specialist, particularly as you may be relying on it to tow your RIB on holiday, would be a nightmare if the turbo went or something whilst towing up the hills in Cornwall. -they are slow enough as it is! Maybe something simple but probably worth getting it checked over.
I have no idea about the diesel treatment, although I have seen them being poured into all manner of cars both new an old at the petrol station after being filled up. Although, im sure I have read as Richard rightly says some injectors don't like it, give a dealer or preferably a LR specialist a ring.

codprawn · 17 May 2006, 16:22

Quote:

Originally Posted by Richard B

OK I'm no Landy buff, but isn't that (diesel cleaning stuff) bad practise for a modern diesel engine? Aren't injectors supposed to be self cleaning? And isn't the first sign of dirty or blocked injectors black exhaust smoke?

As a modern diesel like the Land Rover Storm engine is electronically controlled, perhaps there's the possibility this is an intermittent electrical problem?

If fuel can pass through an injector so can the cleaning stuff - it is probably only kerosene anyway!!!

Yes it could well be an electrical problem but a fiver and 2 mins work HAS to be worth trying!!!

codprawn · 17 May 2006, 17:04

Just remembered - there was a problem with oil getting into the ECU down the loom on certain years.

A bit of Googling refreshed the memory!!!

"Check the red plug on the ECU, if it is full of oil then you have the problem - clearing the oil out of the ECU connector and the plug should cure it short term, but the more permanent fix is a modified harness from Land Rover - however you may be able to seal the harness at both ends with silicon sealant or similar to stop oil getting in and coming out.
The injector harness appears on the engine at the left hand side of the front of the rocker cover (looking into the engine bay from the front of the vehicle)."

Richard B · 17 May 2006, 17:17

Quote:

Originally Posted by codprawn

A bit of Googling refreshed the memory!!!

So you wouldn't spend two minutes and a fiver on injector cleaner now, eh?

codprawn · 17 May 2006, 17:19

Quote:

Originally Posted by Richard B

So you wouldn't spend two minutes and a fiver on injector cleaner now, eh?

Yes cos it won't hurt and MAY still work!!!

Alice · 17 May 2006, 17:44

Quote:

Originally Posted by Hugh Jardon

i have a td5 es and every now and then it will run rough and sounds like it is running on 4 or 3 cyls. other times it will be ok

has anyone got any ideas on this?

The times when it sounds Ok, you'll probably find that you're next to an X5 at the traffic lights. As soon as they turn green he''ll be gone and you'll be bangin' and cuffin' and puffin' off up the road again!

Alice · 17 May 2006, 17:46

Quote:

Originally Posted by codprawn

Yes cos it won't hurt and MAY still work!!!

Pour it straight in the fuel filter body, that'll zap 'em.

codprawn · 17 May 2006, 17:51

Quote:

Originally Posted by Alice

The times when it sounds Ok, you'll probably find that you're next to an X5 at the traffic lights. As soon as they turn green he''ll be gone and you'll be bangin' and cuffin' and puffin' off up the road again!

Why do people keep comparing the earlier Discoverys to things like the BMW X5? The X5 is Range Rover money.

Yes my 300tdi is sluggish and noisy - but compared to things like the Shogun 2.5 and the Isuzu 2.8 it is far better.

Compare a new Ranger Rover or even the new Discovery3 with the X5 and it is a different story.

Hugh Jardon · 17 May 2006, 17:53

ok seeing as i am now aware of the answer i will share it to save any folks wasting time searching and googling, i have done the rectification late this afternoon and it seems to have done the trick

it is a well known problem apparently with td5 discos and the problem and fix are known

would you believe the 13th wire of a part of the loom is not used and the ends of the wire are apparently sealed with silicone, but over time oil makes its way along the cable inside!! as it has broken down the silicone sealant and then deposits all over the red plug on the engine ecu and many times works its way into the ecu

i took my ecu out and the red plug was swimming in oil inside and this is causing the engine to run errrrrratic

check yours and if this is similar then clean everything down with with brake cleaner, allow to dry and then put it back together and you will be fine

mine is perfect again!!!

codprawn · 17 May 2006, 17:56

So why did you ask?

Hugh Jardon · 17 May 2006, 17:57

hey cods, did not see you had replied already when i gave the answers etc

10/10 spot on

top of the class

Quote:

Originally Posted by codprawn

Just remembered - there was a problem with oil getting into the ECU down the loom on certain years.

A bit of Googling refreshed the memory!!!

"Check the red plug on the ECU, if it is full of oil then you have the problem - clearing the oil out of the ECU connector and the plug should cure it short term, but the more permanent fix is a modified harness from Land Rover - however you may be able to seal the harness at both ends with silicon sealant or similar to stop oil getting in and coming out.
The injector harness appears on the engine at the left hand side of the front of the rocker cover (looking into the engine bay from the front of the vehicle)."

Alice · 17 May 2006, 18:15

Quote:

Originally Posted by codprawn

Why do people keep comparing the earlier Discoverys to things like the BMW X5? The X5 is Range Rover money.

Yes my 300tdi is sluggish and noisy - but compared to things like the Shogun 2.5 and the Isuzu 2.8 it is far better.

Compare a new Ranger Rover or even the new Discovery3 with the X5 and it is a different story.

Sorry Codders.

It was meant to be a joke. How 'bout a TD5 and a Fordson Major? Is that fairer.

codprawn · 17 May 2006, 18:22

Quote:

Originally Posted by Alice

Sorry Codders.

It was meant to be a joke. How 'bout a TD5 and a Fordson Major? Is that fairer.

mmmmm reminds me of a joke about a tractor fan....