sageman's 'barn find' v6 sei s1

The place to show off and tell us all about your XMs (or even other cars). Should it be a big project, or just some general pics, start your thread in here.
User avatar
Dean
Global Moderator
Posts: 6032
Joined: Wed Apr 15, 2009 7:53 am
Location: Isle of wight

Re: sageman's 'barn find' v6 sei s1

Post by Dean » Fri May 17, 2019 2:48 pm

I have found much the same as Will states above but with my 12v V6, attaining the voltages stated in the manual is not possible as the throttle spindle is mechanically limited in its rotation in a way that does not allow the TPS to perform a rotation great enough to register .5v at idle and 4.5v at WOT, it should be noted (with my ECU version at least) trailing throttle fuel cut is triggered at anything below about .8v so it is possible to have throttle transition jerkiness at small throttle openings if not set correctly, in the end i gave up, drilled the TPS mounting holes to about 8mm and set idle to .1v below fuel cut threshold and gives 4.4v at WOT i think.

anyway, the reason for the reply is that i sort of remember your symptoms, if the car is running and the TPS is unplugged the engine idle will steadily increase untill it gets above 2500rpm, not sure how far above that it goes as i chickened out and plugged it back in, how or why it would do this i do not know, the only thing i can think is unplugging the TPS upsets the ECU which starts cranking open the ICV incrimentally for some reason. With the ICV unplugged the ECU selects mid throttle state and see's about a 2.5v signal from the open TPS circuit.

A lexia, although of limited use on older cars, can still be a valuable tool in terms of fault finding from live data readout, it should display the following live data:
Engine speed
inlet air temp
coolant temp
O2 signal voltage
O2 heating (on/off)
Drive state (neutral/Drive)
TPS voltage
Percieved throttle state (idle - Mid -WOT)
Ignition advance
ICV position (% open)
Mixture correction
Manifold pressure
Injection time (ms)
Battery voltage (at ECU)

See here for what it can do

D
92 Citroen XM Prestige 3.0i Auto R.P5678
14 Mitsubishi L200 Trojan
89 Talbot Express motorhome Auto-Trail coachbuilt (looking for bonnet, wings, scuttle panels etc)

Addicted to Crackanory

User avatar
sageman
Knows how to use the parking brake
Posts: 131
Joined: Sat Sep 16, 2017 5:07 pm
Location: norwich

Re: sageman's 'barn find' v6 sei s1

Post by sageman » Sat May 18, 2019 5:45 pm

spent several hours on the car today
TPS tested at
.46v at idle and 4.1v at WOT

however i then discovered that with it plugged in the rpms are uncontrollable as soon as you even start to open the throttle the rpms carry on increasing to about 3k i tried and failed to hold it at various rpms above idle it simply wasn't possible
i then unplugged it and it seems to me to rev how it should it also no longer comes back to idle in stages the TPS was the only thing unplugged at this point

ive also found that the throttle linkage/butterfly valve only come back fully shut sometimes explaining why i thought it did
and i think i do actually have a minor vacuum leak with my hand over the idle bypass the rpms decrease but not by much and with my hand over the main throttle intake and idle bypass it will only sometimes stall most of the time it will still run but at the point of stalling

given the throttle was entirly sized when i got it i think i might just get ahold of a new throttle body

i have also sourced the LHM leak on the drivers side
its coming from the high pressure line to the top of the strut and is leaking from the flexable tube to solid tube connection as it go into the engine bay and is coming from the smaller steel tube part the larger flexable part is dry
theres a clamp i removed but couldn't separate the two
are they meant to come apart
1976 Reliant kitten
1985 Reliant fox Tandy campervan
1998 Peugeot 306 GTI-6
h̶o̶p̶e̶f̶u̶l̶l̶y̶ ̶a̶n̶ ̶X̶M̶ ̶o̶n̶e̶ ̶d̶a̶y̶
1993 XM sei V6 RP 5876

User avatar
Dean
Global Moderator
Posts: 6032
Joined: Wed Apr 15, 2009 7:53 am
Location: Isle of wight

Re: sageman's 'barn find' v6 sei s1

Post by Dean » Sat May 18, 2019 9:32 pm

They care a crimped joint, if you remove the pipeyou may be able to get it re-crimped atca hydraulics specialist or more likely a new flex section fitted.

D
92 Citroen XM Prestige 3.0i Auto R.P5678
14 Mitsubishi L200 Trojan
89 Talbot Express motorhome Auto-Trail coachbuilt (looking for bonnet, wings, scuttle panels etc)

Addicted to Crackanory

Dieselman
Global Moderator
Posts: 10938
Joined: Thu Jun 18, 2009 6:44 pm

Re: sageman's 'barn find' v6 sei s1

Post by Dieselman » Sun May 19, 2019 10:23 am

Just keep lubing the throttle spindle and linkages. Mine were completely seized, but are no functioning properly.
Does yours have a working return spring?

Your TPS appears to be working, so the fault isn't that. A setting of 0.5v at idle and >4.5v at WOT would be prefereable to what you have.

You need to find the vacuum leak to be able to proceed. If you ahve a low volume of compressed air, you could use soapy water sprayed on the joints.
Don't forget to block the breather pipe from the throttle body.
92 2.1SED M.RP5740 ECZ Sable Phenicien
92 3.0 V6-24.Rp 5713 EXY Black
92 2.1SD M.RP 5685 ENT Blue Sideral
Prev
90 2.1SD M.RP 5049 EJV Mandarin
92 2.1SD A.RP 5698 EJV Mandarin
94 2.1SD A.RP 6218 ERT Triton Green
91 2.0SI M.RP 5187 EWT White

User avatar
sageman
Knows how to use the parking brake
Posts: 131
Joined: Sat Sep 16, 2017 5:07 pm
Location: norwich

Re: sageman's 'barn find' v6 sei s1

Post by sageman » Sun May 19, 2019 11:29 am

fair enough will try that first then
the bottom spring is fine this is how the top looked when i got it
the end closest the throttle body is now behind it so it act as a spring in the correct direction but how its supposed to be set up i dont know
the plastic gas ram seems to have no function either

Image

could this extra air be coming from the crank breather.... i best test this too
i do have an air compressor
i wonder how i could rig something up though i will think of something im sure

just to confirm this is the connection that is leaking
so this whole pipe needs to be removed from the car (somehow) and this joint fixed in someway by some hydraulics people

Image
1976 Reliant kitten
1985 Reliant fox Tandy campervan
1998 Peugeot 306 GTI-6
h̶o̶p̶e̶f̶u̶l̶l̶y̶ ̶a̶n̶ ̶X̶M̶ ̶o̶n̶e̶ ̶d̶a̶y̶
1993 XM sei V6 RP 5876

User avatar
sageman
Knows how to use the parking brake
Posts: 131
Joined: Sat Sep 16, 2017 5:07 pm
Location: norwich

Re: sageman's 'barn find' v6 sei s1

Post by sageman » Mon Nov 04, 2019 7:43 am

Car has now been moved to the new house but this game me the opportunity to drive it on a private road (farmers drive) it seemed to drive fine although there was a slight vibration coming from the rear I suspect this is unbalanced/bad rear tyres
Before I did this though I bodged the throttle fully closed with some elastic bands with the result being throttle all but perfect (still getting TPS code back but that’s the only one I get)

However I am now confident that it can’t be easily repaired so I need a new one
Any ideas on where I can get one

I took the front drivers strut hydrolic pipe of had it repaired unfortunately at some point I damaged the tread on one end
Can this be repaired and re-threaded of have I knackered it
Dashboard came out to replace bulbs right display now light up fully as do the main clocks however my speedo cable is damaged is this the right part or is this the lower cable
https://rover.ebay.com/rover/0/0/0?mpre ... 3656502060
1976 Reliant kitten
1985 Reliant fox Tandy campervan
1998 Peugeot 306 GTI-6
h̶o̶p̶e̶f̶u̶l̶l̶y̶ ̶a̶n̶ ̶X̶M̶ ̶o̶n̶e̶ ̶d̶a̶y̶
1993 XM sei V6 RP 5876

Dieselman
Global Moderator
Posts: 10938
Joined: Thu Jun 18, 2009 6:44 pm

Re: sageman's 'barn find' v6 sei s1

Post by Dieselman » Mon Nov 04, 2019 8:09 am

That's a lower cable.

Either send the upper speedo cable to Speedy Cables, or Tachograph Richfield, or, as your car is a V6 with fuel trip meter, convert your car to electronic spedometer.

viewtopic.php?f=13&t=7519&p=115220#p115220

Do you have a picture of the wrecked banjo nut, it may be that someone has a duff pipe the nut can be recovered from, or a replacement pipe in entirety.
A replacement nut would require the pipe to be either taken apart and remade again, or the flare to be cut off and a new one swaged.
92 2.1SED M.RP5740 ECZ Sable Phenicien
92 3.0 V6-24.Rp 5713 EXY Black
92 2.1SD M.RP 5685 ENT Blue Sideral
Prev
90 2.1SD M.RP 5049 EJV Mandarin
92 2.1SD A.RP 5698 EJV Mandarin
94 2.1SD A.RP 6218 ERT Triton Green
91 2.0SI M.RP 5187 EWT White

User avatar
sageman
Knows how to use the parking brake
Posts: 131
Joined: Sat Sep 16, 2017 5:07 pm
Location: norwich

Re: sageman's 'barn find' v6 sei s1

Post by sageman » Mon Nov 04, 2019 12:45 pm

I do have a photo but it diddnt come out well and my laptop is broken so I can’t post a picture anyway (should have time to fix it this week)

That said I think it’s just one thread at the beguining of the nut nothing severe which is why I hope to be able to run a die down there although I know these are under high pressure if it was anything else I would be sure it would be fine but on a high pressure system ....?
1976 Reliant kitten
1985 Reliant fox Tandy campervan
1998 Peugeot 306 GTI-6
h̶o̶p̶e̶f̶u̶l̶l̶y̶ ̶a̶n̶ ̶X̶M̶ ̶o̶n̶e̶ ̶d̶a̶y̶
1993 XM sei V6 RP 5876

User avatar
sageman
Knows how to use the parking brake
Posts: 131
Joined: Sat Sep 16, 2017 5:07 pm
Location: norwich

Re: sageman's 'barn find' v6 sei s1

Post by sageman » Sun Nov 10, 2019 5:48 pm

something else ive done is replace all the blown bulbs needed 13 in total this picture also shows the correct idle
the left display look far better in person not perfect but nowhere near as bad as this picture suggest
Image

but hears the picture of the threads best i could get
its only the begining of the thread that is damaged

Image

what rate and size thread is this please
1976 Reliant kitten
1985 Reliant fox Tandy campervan
1998 Peugeot 306 GTI-6
h̶o̶p̶e̶f̶u̶l̶l̶y̶ ̶a̶n̶ ̶X̶M̶ ̶o̶n̶e̶ ̶d̶a̶y̶
1993 XM sei V6 RP 5876

citroenxm
Global Moderator
Posts: 8194
Joined: Wed Apr 15, 2009 9:11 am
Location: North Wales - FAR far far away!!! :-p

Re: sageman's 'barn find' v6 sei s1

Post by citroenxm » Sun Nov 10, 2019 6:05 pm

Is it a strut feed pipe you have damaged?

Ive a fair few of them mostly redudant now as the v6 24v car uses unique to them front pipes.. so I dont need most of the ones I have..
1990 H reg V6 24v Manual .. in progress.. on SORN
Projects:
92 L Xm 2.1t D auto project
Others
07 c5 2.2 hdi 173bhp manual

Post Reply