Mk1 td4 recent trouble starting

Freddie17 · Jul 16, 2023

Hi
My mk1 td4 (’54 plate M47 engine, auto) has, in the last week or so, developed a little hiccup on starting!
Engine hot or cold is irrelevant.
It usually starts ‘on the button’, no throttle needed, just key turn, fires and idles sweet.
Now, key turn, and there is a bit of ‘hesitation’ for a second or so, like it only catches on 3 cylinders or something, then after a second everything catches and all is good. Sometimes need to blip the throttle to get it. Yesterday, it actually took me 2 goes to get it to fire, the first petering out after a second.

Once running, sweet as. Plenty of revs through the full range, all gears, accelerates as normal. I’m guessing this eliminates injectors.

So - any ideas?

lynall · Jul 16, 2023

The list will be endless.
Full tank or low, better or worse in each situation?
When you remove tank cap is there a vacuum?
When last fueled up, did you do it?

Freddie17 · Jul 16, 2023

lynall said:
The list will be endless.
Full tank or low, better or worse in each situation?
When you remove tank cap is there a vacuum?
When last fueled up, did you do it?

I know… could be all sorts. Just trying to get an idea of where to start!
Fuel tank is fairly full - fill it myself always (never go below half). have fuelled since this started, no change.
Will check for vacuum in tank this morning

Freddie17 · Jul 16, 2023

Could this be a faulty glow plug? If it wasn’t summer, that would have been one of my first thoughts. Not sure if they power on at varying degrees, or if it is an on/off only, as required.
Or, LP fuel pump? Still haven’t got round to changing the filter in the wheel arch either?

hd3 · Jul 17, 2023

Freddie17 said:
Could this be a faulty glow plug? If it wasn’t summer, that would have been one of my first thoughts. Not sure if they power on at varying degrees, or if it is an on/off only, as required

there be a .pdf in link .. will give you relevant info.

freelander td4 m47r manual

workshop manual rover 75 BMW47 td4 diesel 2.0

www.landyzone.co.uk

`````````````````````````````````````````````````````````````````````````````
re glow plugs as a possible cause .. as to ..

Freddie17 said:
Now, key turn, and there is a bit of ‘hesitation’ for a second or so, like it only catches on 3 cylinders or something, then after a second everything catches and all is good. Sometimes need to blip the throttle to get it. Yesterday, it actually took me 2 goes to get it to fire, the first petering out after a second.

it would depend on ambient temps .. at the time ..
as in .. a cold diesel without glowplugs would probably / might be be prone .. at a guess,
to hesitate once or twice, before catching .. in recent morning temps.
[ based on a few years using diesels, that had no working glowplugs ]

...............................................
other possibilities ..

a camshaft sensor on the way out, although they usualy fail when hot.
if that fails .. engine won't start ..

dirty / corroded wiring on the fuel-rail sensor connection.
[ original harness be prone to water ingress .. ]

the fuel-regulator on the h.p. pump .. the little rubber/nylon washers can fail.
if they do .. dead engine.

lp fuel-pump on the way out
though, that would show up sooner or later when driving.

.............................................

.. a '75/ZT/TD4 Fault Diagnosis' .pdf be here :

75/ZT/TD4 Fault Diagnosis

Hi folks found this info on the web it would be helpful to some or most of us.:)

www.landyzone.co.uk

```````````````````````````````````````````````````````````````````

Freddie17 · Jul 17, 2023

hd3 said:
there be a .pdf in link .. will give you relevant info.

freelander td4 m47r manual

workshop manual rover 75 BMW47 td4 diesel 2.0

www.landyzone.co.uk

`````````````````````````````````````````````````````````````````````````````
re glow plugs as a possible cause .. as to ..

it would depend on ambient temps .. at the time ..
as in .. a cold diesel without glowplugs would probably / might be be prone .. at a guess,
to hesitate once or twice, before catching .. in recent morning temps.
[ based on a few years using diesels, that had no working glowplugs ]

...............................................
other possibilities ..

a camshaft sensor on the way out, although they usualy fail when hot.
if that fails .. engine won't start ..

dirty / corroded wiring on the fuel-rail sensor connection.
[ original harness be prone to water ingress .. ]

the fuel-regulator on the h.p. pump .. the little rubber/nylon washers can fail.
if they do .. dead engine.

lp fuel-pump on the way out
though, that would show up sooner or later when driving.

.............................................

.. a '75/ZT/TD4 Fault Diagnosis' .pdf be here :

75/ZT/TD4 Fault Diagnosis

Hi folks found this info on the web it would be helpful to some or most of us.:)

www.landyzone.co.uk

```````````````````````````````````````````````````````````````````

Thanks for the info - certainly some areas for me to check.
I hate these types of problems… trying to track the buggers down!

hd3 · Jul 17, 2023

Freddie17 said:
Engine hot or cold is irrelevant.

.. looks like i missed that ..
sort of rules out glow-plugs as a fault .. imho.
.

Freddie17 · Jul 18, 2023

Going in order of price/easiness! Won’t hurt to replace some of these parts anyway.
Camshaft sensor on order…

hd3 · Jul 18, 2023

.. some injector cleaner additive to the fuel might help ..
in that .. the starting symptom could be injector related.

last post in this thread link has yt. animations of the injector internals
'n shows how they work.

Nodge68 · Jul 18, 2023

Try some Comma Diesel Magic, and drive it hard for a couple of hundred miles. It'll help clear out the injectors, which may be fouled if it's just used for pootling about town.

Freddie17 · Jul 18, 2023

Nodge68 said:
Try some Comma Diesel Magic, and drive it hard for a couple of hundred miles. It'll help clear out the injectors, which may be fouled if it's just used for pootling about town

Oo… excuse for an Italian service!
Must admit, I don’t push it hard when driving it, so it could help.

Nodge68 · Jul 18, 2023

Diesels do soot up and like to be run flat out, if the ports and combustion chambers are to remain nice and clean.
I used to find my TD4 would definitely run better after a couple of hours at motorway speeds. Actually my current FL2 TD4 also runs smoother after a good road trip..

Freddie17 · Jul 23, 2023

Right - new camshaft sensor fitted. Comma diesel magic added. No issues so far, but it was only a slight issue to start with, so not certain if a ‘fix’ yet. Will monitor.
When doing the sensor, I noticed what I think is a vacuum pipe that looks like it’s seen better days and needs replacing… it runs alongside but behind the hoses on top of the injectors, by the wiring harness. Looks exactly the same. Is it a vacuum pipe, or something different? Can I replace with a big standard type silicone one? Looking at engine from front, it disappears down deep to the left (didn’t have time to trace it today).

hd3 · Jul 23, 2023

Freddie17 said:
, I noticed what I think is a vacuum pipe that looks like it’s seen better days and needs replacing… it runs alongside but behind the hoses on top of the injectors, by the wiring harness. Looks exactly the same. Is it a vacuum pipe, or something different?

.. there's normaly 1 vac. braided hose, that's routed as you describe,
it be the vac hose for the turbo solenoid.
follow it .. if it's the t.s. one .. it should lead to the lower rear of the engine,
and originates from the vacuum reservoir on the opposite side of the engine.

Freddie17 said:
Can I replace with a big standard type silicone one?

.. many owners replace the braided vac. hoses for silicon types.
be a good idea imo.

diagram of td4 vac connections :

https://www.landyzone.co.uk/attachments/vacuumroute-jpg.44919/

.
be a pic of the turbo solenoid .. 1st post .. here,

Td4 Lack of power at 70mph - fixed !

Hello all, just thought i'd update you on the cause of my lack of power issues with my Td4 03MY in case it helps anyone. I initially had a split turbo hose whilst on the M6. It was the short 90 deg hose. Symptoms were initially lack of power, and then black smoke and air whistling sounds...

www.landyzone.co.uk

.
.

Freddie17 · Jul 23, 2023

hd3 said:
.. there's normaly 1 vac. braided hose, that's routed as you describe,
it be the vac hose for the turbo solenoid.
follow it .. if it's the t.s. one .. it should lead to the lower rear of the engine,
and originates from the vacuum reservoir on the opposite side of the engine.

.. many owners replace the braided vac. hoses for silicon types.
be a good idea imo.

diagram of td4 vac connections :

https://www.landyzone.co.uk/attachments/vacuumroute-jpg.44919/
.
be a pic of the turbo solenoid .. 1st post .. here,

Td4 Lack of power at 70mph - fixed !

Hello all, just thought i'd update you on the cause of my lack of power issues with my Td4 03MY in case it helps anyone. I initially had a split turbo hose whilst on the M6. It was the short 90 deg hose. Symptoms were initially lack of power, and then black smoke and air whistling sounds...

www.landyzone.co.uk

.
.

Brill - thanks

Freddie17 · Jul 23, 2023

Well… took him for a run up and down the M20 to clear the cobwebs with the diesel magic running through half a tank of fuel. Have to say, it was feeling a little more spritely I think. He was sat comfortably at ~~nin~~ seventy for a fair while.
Seemed to start just fine after stopping a couple of times once warm, no hesitation like before, so could be a ‘fix’ already - fingers crossed.
A week or two will tell for certain.

Mk1 td4 recent trouble starting

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.. a '75/ZT/TD4 Fault Diagnosis' .pdf be here :​

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.. a '75/ZT/TD4 Fault Diagnosis' .pdf be here :​

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.. a '75/ZT/TD4 Fault Diagnosis' .pdf be here :

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