Injectors not firing

My 2005 TD4 is missfiring a loud clacking from the injectors,
It stopped and was taken to a so called 4X4 specialist he changed the fuel filter and the pressure sensor on the fuel rail.
It then started to missfire. I have changed all four injectors and checked the wiring to the sensors.
When running I have disconected each injector in turn but it still missfires.
Help

Sounds like it could be a pump timing fault.

Timing done by ecu injectors fired by solinoed but thanks any way

Did you buy new injectors or recon or second hand ones?

I have a similar problem so tried cleaning injectors etc got them out and ultrasonic cleaned them still aloft miss so bought a so called good injector and started swopping out - only got to number one as the injector I used made that loud clacking noise you describe - so could it be a faulty replacement injector?

DO NOT disconnect the injectors while the engine is running,get your car to a decent LR garage,get it on Testbook and see whats going on.

Not a lot of help nearest LR dealer is 200k Think I would do more damage driving with intermittent weak mixture to cylinders than testing for a fault. ie NO fuel to cylinder.

Fuel pressure sensor harness?
Wheel arch fuel pump?
Just clutching at straws with those....have you had it code read?
As angeloc says the clacking is normally a faulty injector....what did you use new, recon or 2nd hand?

scotfrog said:

Not a lot of help nearest LR dealer is 200k Think I would do more damage driving with intermittent weak mixture to cylinders than testing for a fault. ie NO fuel to cylinder.

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Its not the lack of fuel that will harm it,there is a very strong chance of wrecking the ecu if its not connected to all the injectors.
The distance to a dealer is a problem you have to cope with,without decent diagnostic gear and someone who knows how to use it you are likely to waste alot of time and money.
The only other thought is to try to locate a Bosch diesel centre,the Bosch KTS system should be fine on your car,plus the techs there ought to be able to sort out the problem.

Thanks to all for advice and help.
The problem was not confined to one injector, think it was low pressure in the common rail.I removed the connector to the sensor and the engine ran perfectly.
The so called technician who replaced the pressure sensor in the rail messed up the connections. I fixed the connector and all is well now.
Donnie

scotfrog said:

Thanks to all for advice and help.
The problem was not confined to one injector, think it was low pressure in the common rail.I removed the connector to the sensor and the engine ran perfectly.
The so called technician who replaced the pressure sensor in the rail messed up the connections. I fixed the connector and all is well now.
Donnie

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It may not be fair to blame the tech,there is a known issue with that connector.LR supply a replacement harness with an upgraded connector and loom that goes straight back to the engine ECU.

eightinavee said:

It may not be fair to blame the tech,there is a known issue with that connector.LR supply a replacement harness with an upgraded connector and loom that goes straight back to the engine ECU.

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That sounds interesting - is it expensive?

Top of my head.....


£26 + vat for harness


£67 + vat for modified sensor



£400 (ish) fitted at dealer , or a 20 minute job if you happen to own a socket set and a pin.





(i might have pulled these numbers out my arse, but it rings a bell )

The so called tec failed to find the fault caused a fault and insisted it was an injector fault,
which it was not. The garage wanted 2500e to replace 4 injectors, when a french friend queried the cost the he was told it was for 5 injectors, in a TD4 ???????????.
As far as I am concerned the Garage and the so called mechanic are at fault.

scotfrog said:

The so called tec failed to find the fault caused a fault and insisted it was an injector fault,
which it was not. The garage wanted 2500e to replace 4 injectors, when a french friend queried the cost the he was told it was for 5 injectors, in a TD4 ???????????.
As far as I am concerned the Garage and the so called mechanic are at fault.

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Well you have to do what you have to do,but your attiude on this post has not really helped us to give you an answer,it is dismissive at best.The other point is that LR techs in some places may not see enough of certain faults to be able to build up experience of what to us in the UK counts as a common fault.On top of that the parts prices the LR dealers use are often way over the high prices that the UK dealers are forced to use as retail prices.

I dont know any JLR garages that will in-house test injectors anyway, over the fact that they are either working well , or they are working really badly. The middle ground is hard to test.

The usual test for injectors leak off testing and datalogging cylinder balance and fuel compensations.

If you truely want to know to what level your injector is working, you need to remove it and get it tested by a specialist in that area.

They will be able to test spray patterns and such to determine the exact condition of your injectors and if required, also clean them properly.


My opinion anyway

I joined this forum for help and advice all that eightinav can come up with is go to a landrover dealer he will sort it out, he must have a vested intrested in landrover dealers who are over rated, overpaid and in my experience unable to fix the problem. As to my attitude if he had paid out almost 1000e and the problem was worse, I think he would have somewhat dismissive attitude.
I have in the past had a series 3 diesel a 110 hardtop a 300 discovery and a td5 discovery, all were serviced and repaired by myself and my Father with parts and excelent advice from Macrae & Dick Inverness, all had a hard life as they were used on the farm and in an agricultural contracting business. I have also built a bowler tomcat using a 4.6 hse engine. It is little wonder I am dismissive if the mechanic is trying to tell us a TD4 Has 5 injectors surely with limited experience in reading one would be able to deduce that a TD4 has 4 cylinders and aTD5 has 5 cylinders.

scotfrog said:

I joined this forum for help and advice all that eightinav can come up with is go to a landrover dealer he will sort it out, he must have a vested intrested in landrover dealers who are over rated, overpaid and in my experience unable to fix the problem. As to my attitude if he had paid out almost 1000e and the problem was worse, I think he would have somewhat dismissive attitude.
I have in the past had a series 3 diesel a 110 hardtop a 300 discovery and a td5 discovery, all were serviced and repaired by myself and my Father with parts and excelent advice from Macrae & Dick Inverness, all had a hard life as they were used on the farm and in an agricultural contracting business. I have also built a bowler tomcat using a 4.6 hse engine. It is little wonder I am dismissive if the mechanic is trying to tell us a TD4 Has 5 injectors surely with limited experience in reading one would be able to deduce that a TD4 has 4 cylinders and aTD5 has 5 cylinders.

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Eightinavee merely tried to save you causing damage and further expense.

eightinavee said:

Its not the lack of fuel that will harm it,there is a very strong chance of wrecking the ecu if its not connected to all the injectors.
The distance to a dealer is a problem you have to cope with,without decent diagnostic gear and someone who knows how to use it you are likely to waste alot of time and money.
The only other thought is to try to locate a Bosch diesel centre,the Bosch KTS system should be fine on your car,plus the techs there ought to be able to sort out the problem.

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If you want people to offer help and opinions then don't moan when they give it.:doh::doh::doh:

It sounds to me like you know it all already.

Thanks Ratty,as you said it was only my intention to help get the thing right again.
Perhaps I should explain a few things to Scotfrog,first off I have no vested interest in LR or any other main dealers.I have been running an independant LR garage specialising in diagnostic work,(Mostly for other independant LR garages and small local places) for the last sixteen years.Prior to that I did twelve years doing the same thing for my fathers business.(He retired)
So no vested interest,BUT I do have many mates in dealerships,so I know how they are run and what is expected of them.You may be suprised to know how little the techs are paid - there are a few on this forum who I'm sure could confirm this.
You also chose to completly ignore my suggestion of a Bosch service centre who would be much more up to date with common rail rubbish than any LR garage.
Owning and using a machine which clearly you neither have the required technical knowledge,(Or you wouldnt be on here asking how to fix it) or kit to service properly when you are such a distance from help,surely ought to make you question your choice of vehicle.
I'm glad its now sorted,but next time maybe you should ask before doing things like disconnecting injectors whilst the engine is running.Engine ecu is around £800 + Vat last time I did one.Plus they are supplied in a new born state,so they need seeding with the immobilisation ecu and a software download from Testbook before you can use them.

scotfrog said:

I joined this forum for help and advice all that eightinav can come up with is go to a landrover dealer he will sort it out, he must have a vested intrested in landrover dealers who are over rated, overpaid and in my experience unable to fix the problem. As to my attitude if he had paid out almost 1000e and the problem was worse, I think he would have somewhat dismissive attitude.
I have in the past had a series 3 diesel a 110 hardtop a 300 discovery and a td5 discovery, all were serviced and repaired by myself and my Father with parts and excelent advice from Macrae & Dick Inverness, all had a hard life as they were used on the farm and in an agricultural contracting business. I have also built a bowler tomcat using a 4.6 hse engine. It is little wonder I am dismissive if the mechanic is trying to tell us a TD4 Has 5 injectors surely with limited experience in reading one would be able to deduce that a TD4 has 4 cylinders and aTD5 has 5 cylinders.

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With your vast knowledge of internal combustion driven perambulation I would think that you should have figured this one out yerself.

scotfrog said:

I joined this forum for help and advice all that eightinav can come up with is go to a landrover dealer he will sort it out, he must have a vested intrested in landrover dealers who are over rated, overpaid and in my experience unable to fix the problem.

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:crazy: