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JBLancs

Member Since: 17 Oct 2019
Location: Lancashire
Posts: 40

2011 Defender 110 Puma 2.4 USW Zermatt Silver

2.4 TDCI Cranking but wont fire.

Firstly I must apologise as I know that this is a well covered topic on here but having tried various suggestions form the other posts and not really getting anywhere I thought I would ask for thoughts.

My 110 has been doing this for the past 12 months, when in regular use all is well however when left stood for a period of about 3 weeks when I come back to it it just will not start. In the past just through sheer perseverance I have always managed to get it going however this time I have failed.

After the first cranking attempt upon which it will cough slightly as if its trying to start any subsequent attempts to start are worthless as it will spin over quite fast but won't even attempt to fire. After this if I leave the vehicle alone for 5 mins then I can go back and it will have another attempt where it will cough but again not fire. (after that no point trying for another 5 mins and so it goes on)

I am fairly happy that the relays under the seat are good the spade connectors seem tight and I've had them in and out a few times and wiggled them around whilst trying to start and this makes no perceivable difference, the main relay clicks as it should when the ignition key is turned. I have then cracked off the pipe coming off the top of the fuel rail to injector No1 and when cranked over fuel pours from the pipe. I have then this morning swapped the camshaft position sensor from another vehicle but this had no effect either and it still will not start.

Due to the many many cranking attempts I have had to use a jump pack and then eventually I hooked it up to my other defender. I seem to have the best chance of starting when hooked up to the other running vehicle but I'm confident the battery is good as its less than a year old and fine in normal use.

Could anyone suggest any other things I could try as I'd really like to get to the bottom of what is causing this rather than just get it going and wait for the next time it happens.

Cheers

27th Dec 2021 6:02pm

wee-man

Member Since: 27 Jan 2019
Location: IP14
Posts: 37

2010 Defender 90 Puma 2.4 SW Galway Green

might not be of use but I had similar and it was the crank sensor. Ford stamped one is relatively cheap and was an instant fix for me.

27th Dec 2021 6:23pm

JBLancs

Member Since: 17 Oct 2019
Location: Lancashire
Posts: 40

Hi Thanks for that, I nearly swapped them over after the camshaft position sensor made no difference but I didn't fancy mullering the little hear shield on both vehicles if it wasn't guaranteed to help.

Maybe I'll order one up and see if that makes a difference?

Cheers

27th Dec 2021 6:59pm

JBLancs

Member Since: 17 Oct 2019
Location: Lancashire
Posts: 40

This morning I have fitted a replacement Crankshaft Position sensor. This has not helped and I still can’t get it to fire.

Running out of ideas now…

29th Dec 2021 9:04am

ickle

Member Since: 22 Jul 2010
Location: South Vendee
Posts: 1780

2008 Defender 110 Puma 2.4 CSW Alpine White

Fuel problem???

Air leaking into the system - damaged pipe near filter allowing air to be drawn in?

IIRC there was someone on here having similar probs several years ago

HTH Keith[/b]

29th Dec 2021 9:10am

Merlin

Member Since: 30 Oct 2010
Location: Newmarket
Posts: 981

Have you the basic thing of checking fuses? I'm thinking F12.

29th Dec 2021 9:52am

JBLancs

Member Since: 17 Oct 2019
Location: Lancashire
Posts: 40

Regarding fuel problem, that is what it seems like to me? I thought I had discounted this cracking off an injector pipe but just because there is diesel there does not mean that all is good…

I have checked all fuses under the steering wheel and all are good haven’t checked the ones under the seat? Maybe it’s worth a look?

Cheers

29th Dec 2021 11:49am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17372

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

There are several things I would suggest you check, but your access to test equipment rather determines what you can do:

Do you have any stored DTCs?
What is the fuel rail pressure whilst cranking?
Is there a "firing" signal present on an injector?
Is there a valid signal at the ECM from the crankshaft and camshaft position sensors?

Broadly speaking in order to start the engine needs fuel at the right moment in the right place. If there is inadequate fuel pressure, it won't start. There are many faults which can result in inadequate or zero fuel rail pressure, and on the whole on the TDCi these are very poorly monitored by the ECM.

If there is adequate fuel pressure, then it is not being delivered at the right time which may be because the ECM doesn't know when the right time is (crankshaft or camshaft position sensors) or is unable to fire the injectors (ECM fault, harness fault, immobiliser fault).

Diagnosing these on the TDCi can be difficult, time-consuming, and does tend to require a certain amount of diagnostic equipment. You are unlikely to succeed if you don't have access as a minimum to a tool which can read stored faults and real-time values from the ECM.

29th Dec 2021 1:20pm

Leamreject

Member Since: 19 Dec 2020
Location: Middle Earth - Leamington Spa
Posts: 970

Just make sure the immobiliser hasn’t kicked in as this has caught me out several times now.

Because of where I park I don’t set the alarm, when I don’t use it for long periods oddly the immobiliser seems to set so I have to plip the alarm on and off to clear it.

If I don’t do this the landy will crank but not fire until I do, and with the alarm being off I wouldn’t know on entry. Ride like you stole it!!
If I’m not on a bike it’s because only a 4x4 will do…
2011 2.4 Puma 90 HT

29th Dec 2021 4:29pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17372

^^ Nothing odd about that, it is the PI (passive immobiliser) doing its job.

29th Dec 2021 4:46pm

Marks Landy

Member Since: 09 Feb 2015
Location: Cheshire
Posts: 299

Has the engine lost its fuel prime?

Maybe re prime the system or if it’s due a service soon throw in a new fuel filter then re prime.

29th Dec 2021 7:02pm

JBLancs

Member Since: 17 Oct 2019
Location: Lancashire
Posts: 40

Thankyou for your reply Blackwolf, I agree with what you are saying. At this stage without diagnostic equipment it’s like working with one hand tied behind your back. When places open up again on Tuesday I’m going to ask the local garage to come up and take a look. Otherwise I’ll have to have it recovered.

Again many thanks for everyone’s input.

2nd Jan 2022 11:33am

JBLancs

Member Since: 17 Oct 2019
Location: Lancashire
Posts: 40

@Marks Landy, is there an easy way to prime the TDCI?

2nd Jan 2022 11:35am

JBLancs

Member Since: 17 Oct 2019
Location: Lancashire
Posts: 40

Finally coming to a conclusion on this problem. Been through the fuel system with no change in results. The fault seems to be with the dials/clocks and with the wires relating to the security system bridged then now all is well.

Any suggestions of what to do for a more permanent solution?

Cheers

19th Feb 2022 1:14pm

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 1997

Sounds like you need to do the instrument cluster (IPAC) bypass mod. See martins post at the bottom of this thread https://www.defender2.net/forum/topic47486...p;start=90

19th Feb 2022 3:52pm

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