changing diesel injectors

Questions specifically about a Diesel powered C3 (usually engine or fuel related problems)
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Diesel engine related problems
Think: Diesel engine, diesel fuel system, diesel injectors and glow plugs
My Name: cvloenen

Experienced Member
Posts: 55
Joined: Thu Dec 19, 2013 7:36 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 155000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
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Did some more testing today, but still without success.
Removed electro signal clips from injector pairs and no matter which pair sequence was removed it was not possible to dectect any differences, car started and ran on two cylinders - very rough understandably.
I hoping I can still get Lexia 3 going to see if anything is recorded on the ECU.
My Name: jbz2079

Experienced Member
Posts: 51
Joined: Wed May 15, 2013 3:35 pm
Model: C3 2009-2013, New shape (A51)
Year: 2011 (11)
Engine Size: 1.6
Fuel Type: Diesel
Mileage: 75000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: Yes
LHD or RHD: RHD (UK)
Engine name: BlueHDi (100 PS)
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Pull the heater plugs and check them against each other.
If the injector on one cylinder is leaking or stuck open the glow plug will be wet and sooty the cylinders that are running normal should be dry.
My Name: cvloenen

Experienced Member
Posts: 55
Joined: Thu Dec 19, 2013 7:36 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 155000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
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thanks jbz2079, thought about looking at the plugs also but there so ridicously inaccessible. There down the back of the engine arent they, I took of the filter box a while a go to visually check things out behind there, its really difficult to get your head in there to see much at all? I think I'll just leave them as chances are if their like other diesels I've had theyr'll all sooty anyway.

I'm trying to get a blanking of piece for the injector union nut at the injectors, must be something like this available somewhere, perhaps Delphi ? This will cut of fuel to injectors one at a time to identify which if any are flooding the engine. Its just to much hassle at this stage to take injectors out for testing, and car is still in daily use. Pretty expensive to get all four tested proffessionally. It'll save time and money if I just find faulty one if any and just replace it or get it repaired I think.

Will still at some point need Lexia I think, I did buiy a kit but it would not work for some reason. Seems there are some saying there are doggy cheap kits, which is probably what I got for £70. But seen a diagnostic specialist on internet with £110 kit who declares his is not replica and will do what its for. Trouble is it looks exactly the same as what I bought for £70 of Ebay. Is there likely to be a difference I wander? What is a realistic price for a operational kit?
My Name: cvloenen

Experienced Member
Posts: 55
Joined: Thu Dec 19, 2013 7:36 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 155000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
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Still have not progreesed much yet, I'm going to try a leak of test as thats not goin g to cost much money and may point to something.

How long should the engine run during the test? and what capacity of leaked of fuel should I expect for that time?
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My Name: Arfur Dent

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Posts: 3407
Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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jbz2079 wrote:Pull the heater plugs and check them against each other.
If the injector on one cylinder is leaking or stuck open the glow plug will be wet and sooty the cylinders that are running normal should be dry.
The trouble with this seemingly simple test is that the glow plugs are often seized into the head. They are only pencil thin and it doesn't take much to snap one off. Then your 'quickly whip them out for a look' becomes 'I wish I never started this job'. ;)

cvloenen wrote:Will still at some point need Lexia I think, I did buiy a kit but it would not work for some reason. Seems there are some saying there are doggy cheap kits, which is probably what I got for £70. But seen a diagnostic specialist on internet with £110 kit who declares his is not replica and will do what its for. Trouble is it looks exactly the same as what I bought for £70 of Ebay. Is there likely to be a difference I wander? What is a realistic price for a operational kit?
Non working lexia is often due to the user not knowing how to operate it. There is a very steep learning curve for lexia. All the lexia are china copies of the acita diagbox kit. £70 is a fair price. You can always post a question about your lexia trouble in the Questions about a citroen C3 not related to the fuel type section.

cvloenen wrote:Still have not progreesed much yet, I'm going to try a leak of test as thats not goin g to cost much money and may point to something.

How long should the engine run during the test? and what capacity of leaked off fuel should I expect for that time?
Don't overthink the leak off test, its just a comparison between injectors. You know you don't have 4 knackered injectors because it starts. So you just need to run the test and wait until one of the bottles fills enough to show a convincing enough difference to the other 3.

It can be quite dramatic to see the different levels appear as the test runs.
You can add an avatar to your account - Avatar or change your vehicle details - Car Bio or even add a signature to your posts - Signature. But this is not all you can do in the User Control Panel :)
My Name: cvloenen

Experienced Member
Posts: 55
Joined: Thu Dec 19, 2013 7:36 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 155000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
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thanks guru, Now I have some time at hand at last I'm going to try the leak test this weekend.

As a matter of interest how many temp lights should be on when at noromal running. I usually have only two sometimes goes to three which is still just under the half line, wander if this may be another problem, faulty thermostat, heaters are hot enough though.

The Lexia kit I bought was an absoloute nightmare, just would not work, I spent so many hours reinstalling etc and trying different things, following you tube vids etc. But the kits seem all similar just vary in price a little. I used an old xp operated laptop. But I also have a win 7 32 bit laptop and think I would be better getting a kit that operates on Win7, its a faster laptop as well. Could have been a problem with my old laptop in some way, who knows.

Ian
My Name: cvloenen

Experienced Member
Posts: 55
Joined: Thu Dec 19, 2013 7:36 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 155000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
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Been thanked: 4 times

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Managed a leak off test today using old jam jars. Injector 2 (numbering from cam belt drive side) is leaking of about 30% more than the others. The other three injectors are all leaking of almost identical quantities. Jars are represented as cylinder 1 from left to right 4.
leak off test.jpg
Not sure what the original garage did to test injectors when they stated injector 2 was faulty, but this seems to be confirmed by my leak off test. Original test was dome by previous owner, I bought the car just after that.

So, need to get an injector now.

Still would like someone to confirm the number of temp lights that should be on when at normal temp. Dont think this has relevance to my smokey problem but it may not be right for normal running of the engine if water to cold at normal runing temp.
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My Name: C3CAR

Guru
Posts: 2658
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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Still would like someone to confirm the number of temp lights that should be on when at normal temp. Dont think this has relevance to my smokey problem but it may not be right for normal running of the engine if water to cold at normal runing temp.
Rock steady 3 lights when it get up to temperature. (HDi 1.4 16v)

Injector numbering is from the flywheel, 1 at the flywheel to 4 at the cam.

You faulty injector is not so bad, compare with others:

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https://citroenc3owners.com/diesel-citro ... -t901.html


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https://citroenc3owners.com/diesel-citro ... -t901.html


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My Name: cvloenen

Experienced Member
Posts: 55
Joined: Thu Dec 19, 2013 7:36 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 155000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Has thanked: 2 times
Been thanked: 4 times

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Hi C3CAR, yes some of those others are marketly different. I read somewhere that 10% was considered reasonable, any greater difference points to problem. Would that be about right? Mine seem to be all the same apart from that one with about 30% more.

My temp lights hardly ever stay on three lights for long, so there probably is a problem there, thermostat probably. Its not your traditional thermostat in this car iether I think, do you know something about it? Some sort of electric component or something?
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My Name: C3CAR

Guru
Posts: 2658
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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Been thanked: 93 times

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cvloenen wrote:Hi C3CAR, yes some of those others are marketly different. I read somewhere that 10% was considered reasonable, any greater difference points to problem. Would that be about right? Mine seem to be all the same apart from that one with about 30% more.
I would agree, 10% difference indicates not much wear, but 30% does point to a worn injector, well, more worn than the other 3.
cvloenen wrote:My temp lights hardly ever stay on three lights for long, so there probably is a problem there, thermostat probably. Its not your traditional thermostat in this car iether I think, do you know something about it? Some sort of electric component or something?
The thermostat is not so complicated, the electrical connection is only the temperature sensor.

Have a look at these ebay listsing to see what you are dealing with.




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Its arrowed in this picture, just drain down, remove it an replace it then refill.

C3 Coolant refill info.
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