Lack of power after changed injector

[Citipug]

Hi I'm new to the forum but have tried to look on here and Google for an answer to my problem so forgive me if this has been asked before ? Or if I should post each question in separate sections.

My c2 hdi 1.4 had the anti pollution fault a few weeks ago and had fault code p0203 and the common p1351. The history with the car shows that injectors 1 & 4 have been changed already since the car was new so I took the plunge and bought a reconned Siemens vdo injector (euro car parts) and have now fitted it.

I bled the fuel system after fitting and now it starts with a touch of the key and idles fine not rough or anything but lacks power even revving in neutral ? If I press the accelerator hard it doesn't really go much higher than about 1500rpm but if I do it slow and gradual it will go across the full Rev range, although I start to get white smoke when above 3500 Would this possibly be the new injector needs coding ? I don't know how to code the injector in lexia (I have diagbox running v7.2) so if anyone can give a link to tutorial or even just a quick walk through that would be much appreciated I have all the numbers and codes from the new injector ready just not sure where in the program it is ? And am new to lexia so am still a bit wary of what I click on

The p0203 code and anti pollution have cleared as has the cel light. Did global scan with lexia but only shows p1351 which it says is a relay ? I've done actuator tests on the relay and it clicks but lexia says it has a short circuit ? I'm not worried about the p1351 at the min unless it's causing the problems but I don't think it is.

Thanks for any replies guys/gals

[Peter.N.]

Nor very familiar with the 1.5 Hdi but I have had quite a lot to do with the 2.0. and the injectors do not need coding on that. I would suspect your car is in 'limp home mode' there could be a number of reasons for this but I doubt that its anything to do with the injectors although it maybe something that happened when you were changing them.

The Lexia should give you a live read out of individual injector pressures and also fuel and boost pressures, if you play about with it you will soon discover how to use it. There maybe some videos on youtube.

Peter

[Citipug]

Thanks for the reply. I'm aware the 2.0 doesn't need coding but I too am unsure about the 1.4 hdi that I have ? I think The change went ok ? I've bled the fuel system and don't appear to have any leaks or air in the system now ? It is like it's in limp home mode but with no lights or warnings on the dash and nothing on the diag at the min. I drove it to the end of the road and back and it didn't have any pulling power out of first gear. I'm inclined to think it's a fueling issue but am open to suggestion.

I've looked for YouTube videos but most decent ones seem to be in French ? The English ones seem to be all about installation which I've managed to get past (not without a struggle lol had to reinstall Windows 7 cause I was running 64bit now using it on 32bit)

Would the injection pressures not be controlled by the coding ? I presume the pressure would be regulated by the electronics in the injector itself as part of the flow regulator ? Please correct me if I'm wrong as I am new to dielsel engines.

[Peter.N.]

If they are coded yes but they would have to be well out to cause your symptoms. I know the Ford versions are coded and they seem to give a lot more problems than the PSA. If you can run your Lexia it should show if there is much difference between the injectors, on the early 2.0. they self compensate and show the figures, they should be near enough the same.

I am new to electronically controlled diesels but have been running the mechanical ones which are much simpler since 1959 but the reliability of the 2.0. 8 valve engines is better than some of the mechanical ones.

Peter

[wheeler]

Was the car running ok apart from the warning light before the injector change?Is this the 8v or 16v version of the 1.4 HDi ? The 16v ones need coded but i dont think the 8v ones do. If they are codable you just go into the injection system then programing & there is a menu for injector programing.
The other issue you have is that you bought the part from Euro car parts, the quality of their parts (especially 'remanufactured') is questionable, it's certainly not unusual to get faulty stuff straight out the box.

[Citipug]

I will try running lexia on it again this morning and see if I can find more info on the injectors.

It is the 8v version 2007 plate, it was running fine until the anti pollution fault at which point it went into Limp mode, I will clear faults with lexia and rescan see if anything comes up.

The part was reconned at vdo Siemens although I know some of euro carparts stuff isn't the best I don't have many choices where I live.

Thanks for the replies so far I will post back with more info shortly

[GiveMeABreak]

If you have the BOSCH EDC16C3 / EDC16C34 in your 1.4 HDi they will need coding.

INJECTOR CONFIGURATION :
(1) Location of the 8 characters
(2) Location of the ninth character
There are 2 types of injectors :
• 1st generation with 8 characters
• 2nd generation with 9 characters
The diagnostic tool allows you to programme either:
8 characters - Conventional for 1st generation injectors, for 2nd generation injectors the last character (2) does not have to be taken into account.
or:
9 characters - Enter all the characters present on the injector.

[xantia_v6]

Even if the injectors need coding, lack of this should not cause the engine to be in limp mode.

[GiveMeABreak]

It may not cause the severity of the issue described, but will not perform as it should due to the injector tolerances. The injector IMA code allows the ECU to adjust fuelling to the injector's specs. Even re-manufactured injectors are supposed to be supplied with a new calibration code.

Eurocarparts don't seem to have a good reputation here or on other Forums - my own experience concurs with this.

[Citipug]

Ok car won't start at all now ! Have run every test I can find on lexia and no problems no fault codes. There is loads of air in the fuel system again, what's the best way to bleed the fuel system ? I did it at the fuel filter last time. I can't see any obvious leaks


It's Siemens injectors by the way and Siemens ecu

[Peter.N.]

The air will be the problem then. I would take the filter off again and closely inspect the seals, I don't think the Siemens system uses an in tank pump so the system has to be completely airtight, could be a leak at the tank end or at any joins on the way to the filter.

Peter

[Citipug]

Yeah it's defiantly taking air in somewhere maybe one of the connectors onto the fuel filter ? When using the priming bulb there is a squelching noise from the filter and if I try to bleed the filter nothing seems to come out certainly no fuel anyway. I've taken the air filter box off and had a look at the fuel pipes and all around the engine i can't see any fuel anywhere so guess that's one good thing I'm about to try and start it again with a freshly charged battery and if it doesn't work then I might have to bite the bullet and send it to a local diesel specialist ? Still not getting any fault codes so I guess the majority of the work is done and fixed the original problem

[Citipug]

I've got the car running again and it fires first time every time now all faults seem to have gone but still have a problem with low Rev power ? Once the turbo kicks in the car accelerates fine I took it for a drive a few times around the block and except the lack of low Rev power all seems well. I used lexia to remove all storred codes and left it plugged in while I took the car for a drive I then did a global test and got an error regarding egr valve coherence ? I ran a egr solenoid test in lexia and it said no fault and also ran an egr electrovalve test and it said no faults there either ? I plugged another code reader I have into the car and it gave a fault code p2413 egr valve performance ?

[GiveMeABreak]

Could be attributed to a sticking EGR valve - the ECU will command it to open or close, but can't tell if the valve is moving or not. You could try giving it a clean out - if it's stuck open it can lead to poor idling, starting problems and a lack of power.

This VW Passat guy had a crack in the pipe from the intake to the turbo with the same error - so may be worth checking.. P2413 Error

[Citipug]

Started the car this morning and it started without hesitation which is good ! Still have the issue with power if I Rev in neutral it revs to 1500rpm no probs but struggles past that but when driving it struggles upto 2000rpm and then is fine after that. I noticed when I press the accelerator there is a clicking noise like a relay noise that sounds like it comes in and then off again when I press the pedal ?

Thanks givemeabreak I will check the turbo pipe later after work. I also looked at the info you gave a link to for injector coding and I will also take a look at that later I guess it's in configuration then ? I did look in there but couldn't find anything but maybe I overlooked it. Would the option not appear in lexia if if was not needed ? If the Siemens injectors don't require coding ? Also I have all the info off the new injector on photos they are a bit different to the Bosch ones in the image you posted.