P1210 fuel pressure regulator fault

[darbuck]

I don't trust myself to take the connector apart and put it back together without damaging it.

[Rhothgar]

I don't trust myself to take the connector apart and put it back together without damaging it.

Not sure I trust you either!

There is usually a tang that holds the termination into the plastic connector.

Issue is it is largely trial and error. I have a kit for stripping terminations out of block connectors.

It’s certainly a skill (that I haven’t necessarily got either).

You could cut the wire, splice your new one in for testing and then repair with soldered connectors or carefully joining wires, twisting then soldering and finishing with heatshrink.

One sure way of discounting the earth wire.

[Rhothgar]

Much prefer this way though personally.



When I did the temporary ECU fix I cut the wire to be able to connect a bypass wire in temporarily then cut and repair again when I came to swap the ECU out.

[darbuck]

I got it started . don't hunt me down and kill me when I tell you what I did. I had the exhaust temperature sensor and regulator connectors reversed they are both identical brown 2 pin connectors. I just said I would try it and it worked. Two great videos mind you. I do have three bad injectors 2 are running @ -147 and the other one is +143. I am tempted to try the 3 I bought again if they don't work I will have to sell them to try and raise some cash.

[Rhothgar]

That’s FANTASTIC news!

Cannot believe the two connectors are that close together.

I bet you’re kicking yourself more.

As a matter of interest and for reference can you confirm the colours of the wites to each component.

This may prove useful for someone else in future.

How did you find that out? Had you not replaced the wiring? Isn’t that the wiring you actually managed?

The other bonus is that you have found other issues which you have rectified.

I was feeling for you that much. I literally just said to the missus that this could do with a second set of eyes.m and if there was a cheap enough flight from East Midlands I was getting ready to come over with my oscilloscope providing you could have picked me up from Dublin and put me up.

I was really feeling your pain as I drove home today enjoying the drive in the HDi which was giving me grief as bad only 2-3 years ago.

I think you should be posting a video of the damned thing working.

[darbuck]

Ah thanks Roger your an absolute gent I'm after giving myself a good talking to and then a pat on the back. Delighted with myself though The wire colours are white and brown on the regulator and green and brown on the exhaust temperature sensor connector on the loom but the wires on exhaust temp sensor itself are both black.. The exhaust sensor wiring conveniently snapped about 6" from the connector so enough to just solder and the dog was considerate enough to leave a couple of inches of good wiring when he was chewing so enough to solder. I'll upload a video tomorrow evening the rain is biblical here at the moment. Sometimes a break away from it is a good thing I will take pictures of the wiring and video the car running hopefully a bit better than previous attempts

[Rhothgar]

If I cut the earth wire a couple of inches back from the the regulator would that not be the same as disconnecting it and pulse it from there.

Academic now but I would cut any wire needing to be bypassed in an accessible location so you can get at it to do the soldering work.

In fact, the IC60 connector on the Xantia HDi was subject of a reparage bulletin or whatever Citroen call them. The advisory was the the connector should be removed and all three wires hard soldered individually because this connector was prone to damage during a clutch change. I had the clutch done but deemed the connector OK so never bothered to solder it. Perhaps I should.

[Rhothgar]

I'm after giving myself a good talking to and then a pat on the back. Delighted with myself though

Yes. I think it's safe to say a little scourging through self-flagellation is probably in order as penance for your sins.

Seriously though, yeah seriously.

No. I think you've done grand to say you've gone back through it and found something that you had obviously missed. It's not an easy task when you can't see the wood for the trees.

So well done.

Looking forward to seeing the thing running. As for the injectors? Why not have a play around if you have the stomach? Do some leak off tests and the like when you've fully recovered from the scourging...

[darbuck]

Yeah thanks for all the support it helped me to focus on the possibility of wiring rather than parts canon it's really appreciated.. I think I will try and sort out the injectors I am going to do a proper leak off when I get a chance. Herself had a bit of surgery today so need to leave any major work on the car for a few days and work tomorrow as well.i will video it running tomorrow it's not great but a damn sight better than it was.

[Rhothgar]

Yeah thanks for all the support it helped me to focus on the possibility of wiring rather than parts canon it's really appreciated.. I think I will try and sort out the injectors I am going to do a proper leak off when I get a chance. Herself had a bit of surgery today so need to leave any major work on the car for a few days and work tomorrow as well.i will video it running tomorrow it's not great but a damn sight better than it was.

Focus on SWMBO!

Far more important than a video. That can wait a few days at least.

Worth doing leak off test on the injectors which are currently in just to get a feel. I like to video things like this so I have a reference. If you do that, you'll have a reference too when you change injectors and repeat.

On the home straight it seems.

[darbuck]

Totally agree priority is the missus at the moment. Good idea videoing the leak off test. Yeah getting there so relaxed now it's running. Thanks again.

[Rhothgar]

Totally agree priority is the missus at the moment. Good idea videoing the leak off test. Yeah getting there so relaxed now it's running. Thanks again.

I have to admit I nearly died when I saw you had asked for the parts number for the fuel rail...

It was a deflating moment for me to think you were preparing to spend £350+ on a guess. Money would be better invested in a secondhand Picotech 4 channel oscilloscope and then learning to scope data and comparing it to the example waveforms.

Took me a fair few hours dicking about last Saturday with mine and getting confirmed stable readings, stripping wire protection back and testing various parts of the MAP sensor circuit to find that the MAP sensor is actually fine. Lucky for me though I have a mate who will hold my hand and challenge my thought process when things are seemingly out and sit by patiently when something is puzzling me.

There's an awful lot to learn about diagnostics even in these 'simple' cars. The day we stop learning is the end. Always strive to be wiser than you were yesterday.

[darbuck]

My post didn't go up, no I wasn't buying a new rail I was going to get a used one for about €30 . I have a hantek 1008 c not a Pico but does the trick it's just a couple of years since I used it so need to retrain myself. I think I need to back off a little and spend a bit of time relearning diagnostics I just started panicking because I am watching the months tick by and still off the road. I was starting to question the mechanical work I had done aswell. I'd agree they are very simple it is good to have someone to bring you back to basics and use the mind instead of the wallet. I am going to start documenting good waveforms and values when I get back to it as you have suggested. It can make it easier for ruling out stuff without spending too much time or money.

[darbuck]

I don't think any of these injectors are any good any opinions the fastest filling is injector 3 again Even though it's replacement but it is used so Not much use I think.

I am able to actuate all injectors so it's mechanical rather than electronic.

Did you get the car sorted after your scoping last week.

https://youtube.com/shorts/FDqoVIGges4? ... 5KUaAM7j0p

[Rhothgar]

They look fine. They are all fairly equal with no wild variations.

Nice to hear the engine running even though a little staccato in its rhythm!

Can't believe the injector readings are so far out. Makes me wonder if it is actually a wiring issue or ECU issue!!!!!

Whilst it's running, get it rigged up when you are able. Clear the fault codes. Look for any errors and video some live data. Let's see if any of us can collectively make any sense of it.

So is all shot cabling back in place now?

I'd love to see a video of the route of the two brown connectors and their associated wiring. Still cannot get my head around how the connectors can be swapped? I imagine that the exhaust sensors are somewhere up the back of the engine and the IMV is high on the front? How long is the cable to the exhaust sensor?

I have my own woes to deal with this weekend. The sodding HDi spewed s**t loads of LHM out this afternoon. My issue is I need to drive it 15 miles to get it on my mate's ramp!!! I have 6.5 litres of LHM with which to make the journey. I am hoping to use no more than 1.5 litres to get there.

Bloody gutted putting it mildly and I have the engine oil arriving tomorrow. Was hoping to do an oil change to round things off and then this! So frustrated.