P1210 fuel pressure regulator fault

[darbuck]

I'm sorry Roger I need to read your posts. I will do tomorrow, I've just been so absorbed with my one I forgot all about it. The upper engine mount is a problem on the MK1 but an easy fix. I checked every cable in that section of loom. I am pretty confident the wiring is good but want to check a couple of wires again. If it's out of balance it won't last long unfortunately.it might be worth getting it rebuilt.
I'll have a look tomorrow at your posts.

[KennyW]

Darren,

I would replace those earth wires as this could be responsible for a lot of your problems. I think you are almost there.

Good Luck

Kenny

[darbuck]

I am almost there I want to see if it's possible to split the connection enough to replace the cable it looks like its welded along the seam. I will wait until the replacement arrives just in case.

[darbuck]

I wonder if Marc could provide me with a an earth points drawing of the engine compartment, I am not 100 % sure I have them in right places.

[KennyW]

Darren,

I've just been out at my X7 and there is earth to the top of gearbox under the air input pipe, most of the others I think are on the inner wing beside the battery. But Marc will be able to confirm.

Kenny

[darbuck]

Thanks Kenny I just wanted to see where there are some on the inner wing I doubt it makes a difference but you just never know.

[darbuck]

Hi Roger, I finally read your threads. I see we have had similar issues to both of the Citroen's I've had, I have to say I have had my arse handed to me by this car, I know now I'm not alone in suffering Citroen though. I will post when I have had a chance to get back at it herself and the kids dragged me all over Tullamore today so never got near it today.

[Rhothgar]

Darren. It will all come good. You just have to persevere. Clearly the car means something to you as you wouldn’t have gone this far.

I know I’ve had moments where I’ve felt like throwing the towel in for sure.

Once that earth is done, is there anyone you can borrow an ECU from? I’m not sure of the territory there but it would no doubt need reprogramming in some way if only for the immobiliser and it would be programming back to what it was before returning.

Having said that, after my Heath Robinson repair of mine with the wire through the casing and soldered into the circuit board which got the car running (that was the corroded pin 88 episode), I borrowed an ECU of a generous soul on the forum when I had the immobiliser issue and then ended up buying a second hand one on Ebay for something like £25 and transferring my immobiliser chip over to the purchased one.

Going into the ECU is something I’ll leave for you to decide. Not sure what yours is.

You just need to use a hot air gun or hair dryer to soften the glue around the edges and carefully and gently prise it open. Then looks for any obvious signs of water damage or failed components. It will be the last resort. Not searched to see if anyone on the forum has worked on a C5 X7 before.

[darbuck]

Hi Roger, of course you are right and the sense of achievement can be more than worth it. I will fix it hopefully without a new ECU , i don't know anyone else with an x7 but they are small money on eBay so not so bad. I don't know what is involved at present but I did have an issue with ECU on MK1 and ended up swapping out the ecu BSI and fuse box and ignition but I don't think I will need to do that in this instance. I'll post updates as I can. Again thanks for your support on this it's much appreciated.

[darbuck]

Hi lads I just watched this vide on a Mk5 Mondeo same engine and gearbox setup as the C5 similar ECU and it sounds way too familiar to my problems so I am going to see if the leak off behaves like this. If it does I think I will have found my problem. The weather is crap here at the moment so probably won't get to it today but this is a really interesting video.

[darbuck]

Hi lads had a look i am not seeing the back flow in the video I attached earlier.
I did however find a blown fuse on the positive side of the battery it's a 3 amp fuse and it was heavily and blown corroded on the leg on the battery side. (could be my open circuit).

I don't have any of these types of fuse so I will need to pick some up. I wonder if this is supposed to have a cover over it. Can someone have a look at theirs and see please? It attaches to the live side of the battery and if you wouldn't mind would you take a picture of the inside of the ECU and fuse box cover please.i don't know how I missed it.

(A) what size fuse it should be?

and

(B) Should it have a cover mine was in the ECU housing no cover but looks like it should have see pictures below.

[darbuck]

Hi all, just a quick question my wiring Is reading 2 ohms on average when I run continuity testing. Is this ok or too high and if it's too high how do I address it.

[KennyW]

Re the fuse I know mine is hidden under the BSI and NOT protected.

My multi meter produces a steady note to show continuity and a very low resistance.

Kenny

[darbuck]

Ok thanks Kenny, so they are not protected. I will just swap it out, hopefully this will be the answer to my problems.

[Rhothgar]

Hi all, just a quick question my wiring Is reading 2 ohms on average when I run continuity testing. Is this ok or too high and if it's too high how do I address it.

From where to where? How long is the wire?

You need to short your DMM ends together to zero them and to some extent it will depend on the accuracy.

As before, if you are hitting one core that is fine and the rest around it are corroded then when a load is applied it might not be able to cope.

The fuse has blown for a reason!!!

Do we know what it supplies yet and whether the rating was correct?