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Menickb

Member Since: 22 Sep 2016
Location: Cwmbran
Posts: 6

2009 Defender 90 Puma 2.4 HT Bonatti Grey

Puma 2.4 p068a engine controls relay denergized to early

Drive my defender few yards down the road hit or cold and it will start to trying to cut out then go again then try to cut out it will do this until it cuts out completely it restarts then cuts out does this a few times u til it will restart and drive but again tying to cut out well I suppose it does cut out but as I'm rolling in gear it keeps it going so ends up bunny hopping scanned for fault codes and keep getting a p068a engine relay denergised to early I don't get the temp gauge going into the red also checked earth points and loom behind red engine hook on back of motor also changed the 4 relays under seat and terminals going to them as recommended by local LR specialists to no avail any help would be appreciated

22nd Sep 2016 10:15pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20333

Check all relays are fully secure and negative battery clamp is tight.
Worth checking chassis earths etc too.
Check fuses are secure.

You never know it is likely just something loose causing the whole issue. ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️

22nd Sep 2016 10:20pm

Menickb

Member Since: 22 Sep 2016
Location: Cwmbran
Posts: 6

Checked all the above all seem ok it will also cut out if I leave it idle. Same thing start back up then cut out couple of times then won't start unless I leave it a few seconds then it's up again

23rd Sep 2016 7:19am

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20333

How about the plug on the rear of the IPAC? (Instrument cluster) ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️

23rd Sep 2016 9:44am

Menickb

Member Since: 22 Sep 2016
Location: Cwmbran
Posts: 6

I'll check that in the morning. Once left to idle it does tend to hunt now and then and gets worse before it cuts out so think I'll swap out the fuel quantity solinoid on the back of pump think I have a spare from a transit

23rd Sep 2016 4:47pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4646

If you had described these symptoms without naming the vehicle one would suggest fuel starvation or intermittent fuel supply but that would not give you the code you are getting. If it were mine I'd open the drain bung on the diesel filter and see if any water came out. Could be as simple as a bad batch of fuel. If not that we are back to the electronic fault stuff. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

24th Sep 2016 10:01am

Lorryman100

Member Since: 01 Oct 2010
Location: Here
Posts: 2686

Replace the VCV valve on the fuel pump. P068 is a common dtc on the Puma which logs every time you plug in certain scan tools/readers into the OBDII socket.

26th Sep 2016 12:28am

Menickb

Member Since: 22 Sep 2016
Location: Cwmbran
Posts: 6

Replaced the controls solenoid on back of pump and the pressure relief valve on rail and still not better

26th Sep 2016 2:29pm

Lorryman100

Member Since: 01 Oct 2010
Location: Here
Posts: 2686

Did you carry out a pump learn and pilot correction learn. Another issue can be bio contamination of the fuel system also the fuel ports on the filter housing are tiny and can get blocked with crud picked up from the tank. Plenty of posts on here about bio contamination and cleaning the fuel system.

29th Sep 2016 1:36pm

Menickb

Member Since: 22 Sep 2016
Location: Cwmbran
Posts: 6

All sorted replaced fuel sender as it was damaged the swirl pot and tank was full of black silt and grit and bits of grass fuel itself was pretty dirty so cleaned it all out replaced sender unit and also breather pipe as it was split and relocated as a friend from Stratstone landrover informed me the position of the breather on the defender is pretty

and sucks all sorts of crap in new filter and she's running a dream pic of fuel will follow cheers for all your input

Click image to enlarge

29th Sep 2016 5:45pm

Menickb

Member Since: 22 Sep 2016
Location: Cwmbran
Posts: 6

Old on the left fresh on right

29th Sep 2016 5:46pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

have look at the link

http://www.diesel-bug.com/dieselbug.pdf

29th Sep 2016 6:13pm

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