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Tom DCab

Member Since: 13 Jun 2013
Location: West Sussex
Posts: 33

Engine running problem

Hi All.

I have just arrived home from a long journey on the motorway.
I have a problem with the engine that I need some help with

All of a sudden, at about 65/70mph, a strange tapping sound started from the engine or transmission.
It sounds like a stick is attached to the propshaft and is hitting the underside of the vehicle. It is not an even tapping, more random and continueous.

I pulled over at the next services and opened the bonnet. The engine is running very lumpy, as though only firing on 4 cyclinders. It is not revving as it should. When revving you can clearly hear the tapping sound which increases in speed with the engine revs.

She has got me home (another 125 miles) but there is a problem that needs to be sorted.

Can anyone suggest any possible causes, or suggest where to look for the problem?

I had a new clutch & flywheel 3 weeks ago, but I don't think this has anything to do with the problem that I now have..

Many thanks

Tom

TD5 Defender
90,000 miles

3rd Jan 2014 5:01pm

bob neville

Member Since: 30 Apr 2009
Location: Marbella
Posts: 3248

If you have had clutch work done recently my first area to check would be the crankcase sensor.

That will cause the lumpy running, I know as mine was missing the spacer !

Take it out and see if there is any damage to the end.

Pure guess is that the knocking may be related ?

Bob 2015 Jaguar XE240 R Sport - goes like ....... !!
2013 Defender 90 CSW - sold
2009 Defender 110 Double Cab - sold
2001 TD5 90 CSW - offroad project - sold to a forum member
2011 Porsche Boxster - for the sunny days !

3rd Jan 2014 6:04pm

Tom DCab

Member Since: 13 Jun 2013
Location: West Sussex
Posts: 33

Thanks Bob, I will give that a try tomorrow.
I am trying to find out whether the 'oil in the loom' symptoms might be similar to what I am experiencing.

I know that rough running is a symptom so i will check the ECU as well as the crank sensor.

3rd Jan 2014 6:14pm

bob neville

Member Since: 30 Apr 2009
Location: Marbella
Posts: 3248

Oil in the loom will cause rough running as well.

It is the tapping bit I can't work out.

Bob 2015 Jaguar XE240 R Sport - goes like ....... !!
2013 Defender 90 CSW - sold
2009 Defender 110 Double Cab - sold
2001 TD5 90 CSW - offroad project - sold to a forum member
2011 Porsche Boxster - for the sunny days !

3rd Jan 2014 6:17pm

Tom DCab

Member Since: 13 Jun 2013
Location: West Sussex
Posts: 33

The engine is still misfiring constantly at tickover and at all revs.

Called the AA out this afternoon to look at car. He was unable to diagnose the fault as his diagnostic computer (OBD) was unable to communicate with the ECU properly. (which he said he had never experienced before)
His hunch was that it might be an injector problem, although it made no knocking sounds which may or may not have changed his opinion on what the problem might be.

Decided to take it to a garage I had spoken to earlier.
On the drive there is did not do the knocking sound at all but unfortunately by the time I got to the garage they were closing - so were not able to look at it.

I could have left it with them but they said they were very busy and would not able to look at it until next week. So I decided to drive it home again rather than leave it there for 5 days.

During the drive home it started to make the engine knocking sound, exactly as it had done on the motorway.
It is quite a loud, fast knocking (3 or 4 knocks per second) but irregular. It is dependent on engine speed, not road speed.

I am trying to decide what is the best course of action is now:

Do I purchase my own Landrover dedicated fault reader, such as Britpart Lynx / Hawkeye / Nanocom EVO and try and diagnose problem myself?

Take it to a Landrover independent, although I have to say that I am struggling to find one nearby (does anyone know of one near Haslemere Surrey?)

Or bite the bullit and take it to Landrover Main Dealer...

Out of desperation!

Be very grateful for further advice...

(engine temp fine, oil level fine, no oil in red ecu terminal, no smoke, starts easily, just a misfire and odd engine tapping which is intermittant)

7th Jan 2014 8:05pm

adseybear

Member Since: 08 Oct 2009
Location: Vancouver, Canada
Posts: 260

The nearest I can point you in the direction of, and recommend myself would be Challenger 4x4 in Tongham (near Farnham/Aldershot).

I have used them several times. 2003 Defender 90 Td5 CSW Belize Green - "Betty"
1958 Series IIA 109 Station Wagon - "Randolph" - Awaiting Restoration
2019 Jeep Wrangler JL Rubicon - SOLD
2006 Volvo V70 D5 - Ocean Race Edition, SOLD
2003 VW Passat Estate 1.9TDI - SOLD
2008 BMW 320D M Sport Estate - SOLD
2001 Defender 90 Td5 Hard Top - SOLD

9th Jan 2014 12:33pm

Laurie

Member Since: 22 Feb 2008
Location: Sussex, England
Posts: 2897

2005 Defender 90 Td5 XS CSW Bonatti Grey

My guess from personal experience is to change the injector harness (whether it shows oil at the connector or not) and fit new injector seals.

9th Jan 2014 12:50pm

Tom DCab

Member Since: 13 Jun 2013
Location: West Sussex
Posts: 33

Thanks Guys,
I managed to get a diagnosis done today at More4x4 (Kingsley) near Bordon who have been excellent.
Autologic diagnostic found that the cylinder balance on cylinder 2 was incorrect. On inspecion the injector is jamming up and not allowing the spring loaded injector spindle to return to its raised position when the cam lifts. This was what was causing the intermitant knocking sound - the cam slapping the top of the compressed spindle.
New injector will be fitted tomorrow so hopefully problem solved.

9th Jan 2014 6:37pm

Ruari

Member Since: 10 Dec 2013
Location: Ayrshire
Posts: 50

Remember your new injector will need to be coded to the ecu.

13th Jan 2014 12:04pm

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