V6 Xantia......... the beginning of another adventure

[myglaren]

My money's on a vacuum leak Steve.

Yeah, mine too, it's just that I'm going to the Heysham Classic Car and Bike show tomorrow, may have to see if I can have a look...... subject to weather...

My cousin lives in Heysham, must be five years or more since I have seen her, must find an excuse to go over there sometime soon.

[CitroJim]

Jimimah ...

Wasn't she a puddle duck?

A good fix is to find a few cm of more flexible hose and splice it in with a 3mm joiner.

That's what I did on my first V6 Mike. Still good after a few years now...

[Trainman]

Wasn't she a puddled?

Is what I think you mean......

[Trainman]

An early start this morning to head down to Jim's. Items on the agenda today are, first and foremost, the gearbox, if there's time I would also like have a look at the spheres as the suspension can go hard at times and the cruise, plus anything else we can think of, as we go along....

[CitroJim]

I'm here all primed for a spannering session Steve

[Mandrake]

Get your scope ready too Jim

Although it could be the crank sensor there's a good chance it could be a wiring loom fault, and I don't fancy tracking that one down...

[CitroJim]

Although it could be the crank sensor there's a good chance it could be a wiring loom fault, and I don't fancy tracking that one down...

I've thought of that Simon I'm really trying not to and hoping it's not!

Also, Chris570 came up with the thought that the LPG system most likely uses the same signal too so it could even be related to that. Some of the pikey wiring I've seen around LPG installs certainly makes it worth checking.

[Mandrake]

Oh, I completely forgot about the LPG conversion. That's definitely a suspect too. Is there any circuit diagram with that or is that too much to hope for ?

I doubt it piggybacks on the engine speed signal between engine and gearbox ECU's though as I believe that's a digital waveform that would be highly specific to the model of car and ECU's, if it needs an RPM signal it most likely gets that directly from the crank sensor which is more like a rounded off triangle wave. But even there it could be causing a problem if there is chafing in the wiring to the LPG kit causing a momentary short...

Good thinking, I'd be giving that LPG kit wiring a good going over...

[Trainman]

Well I've arrived at CitroJim Central, just awaiting the Grand Master to polish his tools

[Hell Razor5543]

OO ERR Missus!

[KP]

Good luck guys! Hopefully the LPG setup isn't the cause!!

[Hell Razor5543]

Good luck guys! Hopefully the LPG setup isn't the cause!!

If it is, I hope it is simple to track down and resolve. Good luck.

[CitroJim]

Good luck guys! Hopefully the LPG setup isn't the cause!!

If it is, I hope it is simple to track down and resolve. Good luck.

Thanks James and Will

It was not the LPG system but we did find the crank position sensor a bit iffy. We measured a good one at 380 ish ohms and the one on Steve's car started out at 700 ohms and kept rising toward an open circuit. Most odd.

Want a complete to replace it though. Inlet manifold off, which meant disconnecting the LPG injectors, then we had to drain the coolant and disconnect four hoses before we could even barely see the sensor. Then it had to be got out. All in all a real good job and girly hands were very valuable! It all went well, we fitted a replacement and checked/cleaned the Bitron sensor and the over-temperature warning sensor. In fact the Bitron sensor was removed to give just a tad more access to the crank sensor.

Once again my little 1/4" socket set with a wobbly joint was essential...

As the MOT is due we rounded off the day by giving it a pre-MOT and greasing the height correctors. The front one was just a tad lazy but the grease seems to have sorted it.

All seems OK on test. Steve is now on his way home...

It's been a good day and fingers crossed the crank sensor was the problem

[CitroJim]

Sadly the crank sensor wasn't the problem despite looking as if it was Steve has just called to tell me.

Somewhat gutted Still, at least we've ruled out one thing. We'll swap the ECU next and if it's not that then it must be wiring...

[KP]

Book it into my local MOT place Steve and pop round for a brew and waffle as they like citroens

Good news on the sensor front and I'll keep everything crossed for this now being a closed issue!