Nodge68 said:
Does the D3 oil temp sensors cause a misfire, or just an instability of the idle?
Click to expand...


My experience is an ustable idle, but like lots of modern stuff, one fault can cause weird issues elsewhere.

Just had a quick search on the d3 forum for oil temp sensor, results were strange, unstable idle/stalling/trying to stall/strange temp readinsgs on the dash and so on, so you never know?
 
lynall said:
My experience is an ustable idle, but like lots of modern stuff, one fault can cause weird issues elsewhere.

Just had a quick search on the d3 forum for oil temp sensor, results were strange, unstable idle/stalling/trying to stall/strange temp readinsgs on the dash and so on, so you never know?
Click to expand...

Ok. So I'll see if I can get the live data from the ECU on oil and coolant, so I can compare them directly.

The I930 should work for that I think.
 
Nodge68 said:
That's the issue, going by the quality of the other work this poor engine has seen, it makes me wonder if they were done on the cheap. I actually don't know what can be reconditioned in these injectors, as I didn't think this design had any moving parts. :confused: I'm tempted to pull a damaged second hand one I've got apart, just to see what goes on inside. :eek:
Click to expand...

They probably just spray some cleaning fluid through them and call it a refurb.....just a thought is it worth recoding all 4 injectors again, in case something was missed???? Is this possible??
 
jedi said:
They probably just spray some cleaning fluid through them and call it a refurb.....just a thought is it worth recoding all 4 injectors again, in case something was missed???? Is this possible??
Click to expand...


I think anything common rail is pretty much new only injector wise, there are some vids on youtube where a guy is adjusting the pressures on common rail injectors back to factory spec, but if the nozzle has had it then yes the pressures may be correct but the rest wont be.

I think Nodge needs to estabilish 100 percent that he has electrica; power at the injector/s when one or more cuts out, then that will eliminate ecu/wiring or the injectors themselves.

I ummed and aahed for months before buying the new ones for my D3, 1250 quid on a 4k car is a big ask of anyone, I like it I know it I trust it so I bought them.
 
jedi said:
They probably just spray some cleaning fluid through them and call it a refurb.....just a thought is it worth recoding all 4 injectors again, in case something was missed???? Is this possible??
Click to expand...
Annoyingly the diagnostic software doesn't show the current injector codes, so I can't check them against the code tab on the injectors. I know when I swapped No 2 and No3 over, the cold misfire didn't change, and the engine smoked loads, so I assume the coding to be correct.

I've got an apparently working injector arriving this week to try out.
lynall said:
I think anything common rail is pretty much new only injector wise, there are some vids on youtube where a guy is adjusting the pressures on common rail injectors back to factory spec, but if the nozzle has had it then yes the pressures may be correct but the rest wont be.
Click to expand...

I tend to agree, it's just the cost of new injectors, which is rather steep. :(
 
I ran into a dead end trying to get mine refurb'd - in the end up i got tested ones from a breaker i was told about on here.
None of my codes now match up - my foxwell can read, but runs into a security issue when trying a re-program hence the need for the SDD.
 
Nodge68 said:
Annoyingly the diagnostic software doesn't show the current injector codes, so I can't check them against the code tab on the injectors. I know when I swapped No 2 and No3 over, the cold misfire didn't change, and the engine smoked loads, so I assume the coding to be correct.

I've got an apparently working injector arriving this week to try out.


I tend to agree, it's just the cost of new injectors, which is rather steep. :(
Click to expand...
Is my memory mischievously making a monkey out of me, or didn't your wife picl up a set of reconned injectors on eBay when you first bought the car?
 
Jayridium said:
Is my memory mischievously making a monkey out of me, or didn't your wife picl up a set of reconned injectors on eBay when you first bought the car?
Click to expand...

No. She got a set of second hand injectors from some bloke on Facebook. None look to be in working condition, and 1 is even broken where the 10 digit code should be.

So the broken one will be pulled apart so I can work out how they work, and the other 3 will probably go in exchange for some refurbished injectors.

I've got a guaranteed working second hand one commit this week, which I'm hoping will help me identify the faulty injector.
 
I have had an idea dah dah! cheap as well.

Get one of these temp sensors and thermocouple, cable tie thermocouple to injector and watch temperature until it runs on all four, do the same for each injector until you work out which cylinder is showing the odd/low temperature, then swap problem injector with known good sylinder injector and measure temps again, and see if fault moves with injector (injector faulty) or stays on the same cylinder (wiring/ecu/mech fault).

https://www.ebay.co.uk/itm/Digital-...896904?hash=item2f2f5a19c8:g:w3oAAOSwWVFcuJT3

Edit its a K series thermocouple, available in loads of different lengths/styles.
 
lynall said:
I have had an idea dah dah! cheap as well.

Get one of these temp sensors and thermocouple, cable tie thermocouple to injector and watch temperature until it runs on all four, do the same for each injector until you work out which cylinder is showing the odd/low temperature, then swap problem injector with known good sylinder injector and measure temps again, and see if fault moves with injector (injector faulty) or stays on the same cylinder (wiring/ecu/mech fault).

https://www.ebay.co.uk/itm/Digital-...896904?hash=item2f2f5a19c8:g:w3oAAOSwWVFcuJT3

Edit its a K series thermocouple, available in loads of different lengths/styles.
Click to expand...

That's not a bad idea. I have a duel probe temperature monitor, with matching clamp on K type thermocouples, so I can monitor 2 injector temps at the same time.

I might try that. Thanks for the suggestion.
 
Nodge68 said:
That's not a bad idea. I have a duel probe temperature monitor, with matching clamp on K type thermocouples, so I can monitor 2 injector temps at the same time.

I might try that. Thanks for the suggestion.
Click to expand...



I was mainly thinking its cheap i like cheap, especially if it actually provides clues.
I would hazard a guess so long as you write al the temps/times down as they happen it should be apparent which cyl is the odd one out?

I bought similiar for me boat, and was surprised how quick the reaction time was from ambient to finger temp.
 
Andy Warren said:
From cold though the 3 that are running ok should run hotter initially, just have to be quick swapping from injector to injector.
Click to expand...


I was thinking if no rush, do one injector in the morning, allow a couple of hours to cool then next one and so on, obviosusly take all day but should be accurate ish!

It may be my imagination but I notice modern car engines seem to cool down real fast once switched off, wheares old crap seemed to stay warm for ages.
 
lynall said:
I was thinking if no rush, do one injector in the morning, allow a couple of hours to cool then next one and so on, obviosusly take all day but should be accurate ish!

It may be my imagination but I notice modern car engines seem to cool down real fast once switched off, wheares old crap seemed to stay warm for ages.
Click to expand...
Probably down to weight saving keeping engine components as thin/light as possible. Having said that these diesels are still big lumps.:)
 
the injectors are controlled with a digital signal - a bulb to them could be like a piece of wire to a bulb.
Even with a scope i would be going x10 probe (high impedance) so that it does not impact the signal.
 
What about a low wattage bulb? Should not affect injector performance too much, would it?? They should all glow at the same rate, if one glows differently, may indicate a fault on that injector.
 
You must log in or register to reply here.

Similar threads

B
***Help please!*** I've got a misfiring 2 litre Diesel Freelander
Replies
12
Views
6K
thequeenscheese
thequeenscheese
B
I've got a misfiring 2 litre Diesel Freelander
Replies
3
Views
1K
wiltshire landyman
wiltshire landyman
hoarec
Rough Running On Cylinder 3.......
Replies
6
Views
2K
hoarec
hoarec
hoarec
Running Rough on Cylinder 3.....Help Please
Replies
13
Views
2K
hoarec
hoarec
W
2.5 N/A Diesel running on 3 cylinders
Replies
5
Views
7K
wingnut1033
W