None starter!

QRHcooper · Dec 16, 2018

Hi All,

Currently I am trying to troubleshoot a none starting TD5 Disco (turns over happily with an initial ‘blip’ after a long prime) and I believe it may be a potential fuelling issue!
Should I be seeing pressure at this connection on the attached diagram??

Basically I was happily driving along and the throttle response became intermittent on full throttle, becoming gradually worse over a 5 min period until she idled then cut out.

Initially thought fuel pump but, I’ve just sprayed pressurised diesel all over my boot whilst connected to a pressure gauge

I’m thinking it could be the fuel regulator??

TIA Mike

sierrafery · Dec 16, 2018

Hi, the pointed one is the return line but you get pressure there anyway, pressure measurement is relevant in the FPR in the port where the FT sensor is screwed in... if it stopped while driving and you hear the pump running i doubt it's a fuel supply issue cos the Td5 runs on low pressure too without power it doesnt stop just like that.

you need a tester to check the crank sensor input or it can be other management issue too like a topside switch failure or who knows what

Discodevon · Dec 17, 2018

I would say your fuel pump has pooped itself

QRHcooper · Dec 17, 2018

Thanks for the replies

Current Fault on my ECU and viewed via my Lynx Diagnostic tool is Road Speed Missing. I don't have anything else popping up whilst cranking the engine, should I??
Cleared my existing fault memory when she first broke down as I had induced a number of faults through my initial investigation but, didn't notice anything out of the ordinary before I did.

She turns over nicely and every 5 or so cranks she does a slight hiccup! She also fired up but died after a quick squirt of easy start

was only a liberal squirt!!!

Currently my situation is as such,

Have ruled out the Fuel Pump and FPR as it is maintaining pressure on the HP line from the pump and through the FPR back to the fuel cooler. (apparently the area circled in my first post wont see any pressure until the engine is running as the injectors wont allow fuel past) Haven't checked filter yet but, its pretty much brand new..
Have replaced the Crank Sensor and cleaned the plug.
Have checked the Capacitors for Ohms inside the ECU, both appear to work as intended although, I would like to "borrow" a 10p Auto ECU" to completely rule out ECU.

Have already checked for visual signs of obvious wiring damage. next step would appear to be pinning out but, I'm not entirely confident I know where to start on this

Got a feeling its going to be a wire(s) somewhere..

If any of you fine gentlemen could offer me any advice where to start I would be most appreciative

sierrafery · Dec 17, 2018

The ''road speed missing" code would not affect starting whatsoever, it's about the VSS(vehicle speed signal) delivered by the SLABS and used more in autos and as long as the speedometer works it's just a glitch, quite common

measuring capacities was futile cos if there was a problem there the code would have been ''topside switch failure", if it's manual try to bump start it also measure voltage while cranking cos if it drops below 10.5V it will not start

also if you have lynx read live rpm while cranking

QRHcooper · Dec 18, 2018

Soooo, after I finished playing around with my ECU last night, I refitted and thought I’d turn her over one last time.... started first time ‍

Other than having the battery on a good charge all day (have tried jumping it off 2 different sources already) I have done nothing extra than listed above

Going to have a good look around my connections and loom today as I believe It may be a loose wire or short somewhere in the harness...

sierrafery · Dec 18, 2018

measure the voltage with engine running

QRHcooper · Dec 18, 2018

Video of her choking..

I started her again this morning, all appeared fine. Left running for approx ten min then, she stated to splutter again before eventually stalling...

Have measured the voltage whilst running it’s over 14.3vdc and round 12.3vdc in the battery down to 11.6vdc during crank.

QRHcooper · Jan 2, 2019

Just an update on the issue I had with my none starter..

After receiving the advice that I should change the injector seals I immediately set about purchasing and fitting a complete set.

I was careful to follow a very useful guide via YouTube

Upon completion of the task I had still progressed no further due to encountering the same “kangarooing” effect, I had hoped to alleviate, once she started..

After threatening to sell her at auction I decided to wait until after the Christmas period to revisit the problem..

So today I went outside for another round of head scratching. I primed the fuel for a good 10 min and found, to my dismay, that the engine would no longer crank and was fixed solid..

Removed fan and attempted to turn by hand to no avail. Obviously something was wrong so I proceeded to remove the rocker cover..

Upon removal it was quite obvious that my injector seal replacement had gone astray as it was filled to the brim with diesel ‍

Once I had siphoned all the accessible fuel I began the procedure to check all the injectors for correct placement ect.

Upon checking injector 5 I found that I had not seated the O-Ring correctly and it was sitting in the wrong groove (utter twonk)

All injectors were replaced ‘correctly’ and the contaminated oil drained and replaced. After a lot of priming and a lot of white smoke she started and drove lovely

Moral of the story, don’t be a twonk and don’t rush ffs

QUESTION - Would I have done any damage by soaking the whole engine with diesel

Cheers

Landmark2 · Jan 3, 2019

Probably cleaned the oil off

Griff

1988smithy · Jan 3, 2019

QRHcooper said:
Just an update on the issue I had with my none starter..

After receiving the advice that I should change the injector seals I immediately set about purchasing and fitting a complete set.

I was careful to follow a very useful guide via YouTube

Upon completion of the task I had still progressed no further due to encountering the same “kangarooing” effect, I had hoped to alleviate, once she started..

After threatening to sell her at auction I decided to wait until after the Christmas period to revisit the problem..

So today I went outside for another round of head scratching. I primed the fuel for a good 10 min and found, to my dismay, that the engine would no longer crank and was fixed solid..

Removed fan and attempted to turn by hand to no avail. Obviously something was wrong so I proceeded to remove the rocker cover..

Upon removal it was quite obvious that my injector seal replacement had gone astray as it was filled to the brim with diesel ‍

View attachment 166300

Once I had siphoned all the accessible fuel I began the procedure to check all the injectors for correct placement ect.

Upon checking injector 5 I found that I had not seated the O-Ring correctly and it was sitting in the wrong groove (utter twonk)

All injectors were replaced ‘correctly’ and the contaminated oil drained and replaced. After a lot of priming and a lot of white smoke she started and drove lovely

Moral of the story, don’t be a twonk and don’t rush ffs

QUESTION - Would I have done any damage by soaking the whole engine with diesel

Cheers

I have recently done EXACTLY the same LMAO.

Absolutely fine since apart from a cold start issue which I don't think is related.

Might be worth changing the oil soon and I take it you've checked the level? My engine filled with diesel, I drained 25litres out of the sump. EDIT just re-read your post sorry.

Still change the oil again after 100miles or so, get any traces of diesel out

If you couldn't turn it by hand it was possibly hydrolocked

sounds like we've both been lucky

As @Landmark2 said, and someone said to me at the time, the oilways are probably spotless now

Discodevon · Jan 3, 2019

Hi one problem you can have with the engine locking up is a bent Conrod, if this has happened it won’t start very nice when cold, although you may be lucky to get away with it

Well done on getting her going

None starter!

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