Injectors misbehaving but trying to understand the numbers

[darbuck]

I'll have a look in a bit. I've never considered it as possible problem before this. It also says no egr I think it just means its not using it because it's not learned as such. Otherwise it has been mapped out but I doubt it. I will try actuating it after lunch. Just having a coffee and going to head out

[darbuck]

Ok so I have had a look and there is definitely air in the fuel lines.I can't really hold the phone steady because the engine is hopping so badly. I checked the fuel line on the 508 and it doesn't have this. I'm going to try and change o rings and see if it makes a difference. this is my fuel line to the pump.

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[darbuck]

Epic fail changing the o rings so I had an old connector and used it . No difference then I noticed air in the line from the tank to the filter and because of the change in connector I can see the fuel coming out of the filter and I can say the air is worse than I thought. I need to stop the air coming from the tank. I have photos of the data if anyone can see anything that really stands out apart from the injector open time.

[darbuck]

As well as learn, there's also "actuator test" have you given that a go for the EGR valve? (Cycles it without the engine running so can hear it it's doing anything)

Hi Matt I have had a look and there's no option on diagbox to actuate the egr which I think is strange.

[darbuck]

Hi all, I have noticed a few times not always that it says depollution system faulty when I turn on the ignition it goes away when I start it. I assume this is related to the glow plug p1351as there are no other codes.this on it's own is intermittent.

Back to air in fuel from the tank, I can see big air bubbles coming from the filter when I rev her. I think this is the problem. I am going to change the seals on the air and water vent on the fuel filter.

[darbuck]

Ok so it takes 3 or 4 goes to start now so cold makes it worse. I tried blanking the egr for test purposes made no difference so not it. I'm back to fuel, had to be the air in the fuel. I'll have to wait until the snow goes away.

[darbuck]

I threw more diesel into it and it started easier I can still see some air on the pump side of the filter and try to bleed it. It could be not purging the air correctly because of the fact it was low on diesel. I know I should have checked this earlier. I just went down a rabbit hole I do think there is a Comms issue with the egr though so I will need to investigate this further not today though. I might try bleeding it today but that will be about it.

[darbuck]

Ok so while running tests she finally threw some codes and said two of my injectors are stuck closed. I had these injectors tested and they passed apparently not impressed.

[MattBLancs]

Hi Darren, sorry been busy, just catching up.

No EGR actuator test= odd, was sure it was in there somewhere!
EGR blanked made no difference= I'd not worry about the EGR anymore at present, focus on other stuff.

Air bubbles seem thing to focus on. Don't think low fuel (unless literally near empty) would have an effect on what pulled down the the lines, it draws from the bottom of the tank.

Injectors reported as stuck closed= a faff, but could you swap the position two good for two bad, (clear, then) see if noew codes raised for the moved injectors = would help confirm if truly the injectors or it is something wrong with a particular pair of cylinders, just the ECU is flagging it up as being the injectors.


Glowplug fault p1351 = think that is the dead common one, think mine has it, does not give anti-pollution warning (or management light on) for me

[darbuck]

No bother Matt, I'm sure your flat out with kids and work as I said this is becoming a blog. I have 4 other injectors I might try one of them first and swap each of them out until I see something else. It sounds like stuck injectors when it's running. I also have an egr fault P0406 so egr is a problem too. I have direction though so I'm back to testing injectors. I keep hearing Einstein in my head "doing the same thing and expecting different results is madness" I'm half afraid to move the alleged good injectors as moving anything on this car seems to make it fail. I have a direction now at least. I will do a compression test first I think.

[darbuck]

I'm going to try swapping them around first as you have suggested to see if it moves if it does I know its the injector. I will post up results. I found the leak off test in diagbox as well . The car will run the engine through various speed ranges to give a better indication of injector health.

[darbuck]

Hi all, I threw three injectors one at a time starting it and it improved every time I changed one. She's running better than she has for a good while now I'm a lot happier that I changed the engine. 2 and 4 were bad and 1 was nailing badly so I changed it and it finally stopped hopping on it's mounts. The issue I have now is the engine shudders when I shut it off . I need to See if it settles now when it's cold. I will try it again this evening to see how it runs from cold. The egr started working again as well so finally making progress. I need to code the number 1 injector which should help as well. I've still to put the replacement rad in and the gasket and clip on the egr and rebuild the front. She needs a good clean as well. Runs clear now no bubbles.

She was full of air as well really bad I disconnected the return line and ran it with a hose going into a fuel can. It was really frothy for a while.
Edit
I meant to say the egr now works so I think the ECU was ignoring the egr because the injectors were so bad or else the air flow was so bad the ECU was having to supply extra voltage to make the egr work

[darbuck]

I have been out this morning and she starts and runs a hell of a lot better than she was. She's still jumping a tiny bit but I think that is because of a worn or loose engine mount I need to investigate.

She is fuely again but this could be because she is cold. Still notthing like she was with the old engine but this could be because of the leaking gasket on the egr and because I have to code the last injector. It should help as well.

Now it's quietened down I can here a low grumbling coming from the timing end of the engine. I'm not sure what is causing it I hope it is not the oil pump. I didn't see any signs of a problem when I had the sump off but a pump can look perfect and be crap inside I probably should have tested it when I was in there.
She is saying that the oil temperature sensor is bad so maybe it's affecting something I'm not sure. I need to check oil levels as well. They should be good as I put 5 and a half litres into her.and I'm not aware of any leaks. It could be the bad rad is pulling air in and causing noise. It could also be because I was running it with bad injectors for a while and it needs to settle back in. Driving should help if nothing is obvious.
Plan is double check everything is ok and put her back together and run her up the road and back see how she behaves. If not too bad bring her in for a test see what they pick up. I think I am more or less at make or break now. Just a bit of tidying up as I say.

[shtu]

She is saying that the oil temperature sensor is bad.

It may well be fine. Citroen log weird error codes if you run it but not up to temperature, switch it off, and run it again.

eg viewtopic.php?t=75447

As long as the oil level and pressure is OK I wouldn't worry about that yet.

[darbuck]

Ok thanks shtu