If a ZPJ4 engine feels weak, it's usually caused by stuck ACAV (Admission á Characteristique Acoustique Variabele) valves. They adjust the length of the intake manifold, giving high torque at low revs and high power at high revs. There are 3 ACAV valves - 2 at the U-bend (controlled by one single solenoid, should be open at idle and closed up to 4000rpm) and one in the middle (controlled by another solenoid, should open above 5000rpm). You can test them by directly applying 12 volts to the solenoids.
The most common issue is defective electrovalves. It's easy to check, both of them should operate at higher RPM. Just rev the engine and look if linkage from the black capsule moves the flap. Hint: There are two elactrovalves, one green on the top of the inlet manifold and one brown at the back of right corner, between AC compressor. Both of them are unavailable, but the brown one is exactly the same part number like on 2.5TD XM MK2 EGR electrvalve, and they're are usually good. So if yours is bad, just buy used one from 2.5TD.
There is a gentleman called Hein Gysen who is a wealth of knowledge in California about the CX and XM. He drives a CX that has 1 million kilometers on it. He has worked for Citroen for a long time.
Always a New Year bonus when you arrive back to your garage and the test drive didn’t set the car on fire 🔥😂, had my fingers crossed 🤞 the whole journey 😉👍🏻.
It could be 5 and 6 are leaky/worn injectors, or the rest are patially blocked, especially if you think it's running a bit lean. Chuck some injector cleaner in it anyway, or take it for an Italian tune up!
Good to hear it didn't burst into flames, always a good thing. The Sun tune machine brought back memories of working in a Mercedes/Porsche/Ferrari dealership in the late seventies. We used all kinds of wierd high tech stuff that looks like science fiction movies from the sixties now. Fascinating.
this sun computer walked out of a buck rogers movie :) i adore your channel. as a experienced citro (cx, 2cv, and jaguar) driver it gives me great joy to see you (in stead of myself :) ) struggle with the weird french en english car designs. i like to keep the maintenance weirdness routines in a affordable en reasonable 2cv6 level. so that car is the only keeper in my classic wagonpark.
You can start the trip computer (the right side display showing the outside temp / current fuel consumption / avg. fuel consumption) by long pressing the button on the tip of the right side stick.
The front suspension mountings (domes) are not that expensive considering the risk you eliminate when you renew them, someone in Lithuania sells fully refurbished ones about €180 each since about 15 years, they have passed the test of time! For the time being, avoid turning the steering, that is what gives the domes the highest strain.
Just bought a pair of those lituanian domes from Technocitro (in France) and it only took a few hours to have them installed by a specialist. I'm now wayyyy less anxious when encountering roundabouts, speed bumps and tight turns.
When you switch from automatic suspension to sport suspension there should be an orange light in the upper left corner on the dash… most likely either a dead bulb or bad connection….
Alt for fedt, at dit fix virkede! Og SÅ cool at din tester virker! Da testen kørte lignede du en, der lige havde været til eksamen og ventede på din karakter. Lidt ligesom når man er til syn med en bil. 😊
Back in the '60's I had my Volvo B16 Amazon (6v) checked over on a Crypton machine. Not much to check but we were looking at the ignition. There was a test that allowed you to see on a graph how much current was being drawn when the plugs fired under compression. Found one was low. New plugs got them all even again. Did you fit new plugs to the XM? Maybe the 2 with high numbers aren't burning very well. Yes, dribbling injectors could mean over rich and incomplete burning. Happy New Year!
Hi Seppo, really enjoyed this upload, one of your best I think, so good to see the Sun in action. Many thanks and happy New Year to you and your family
Happy New Year to you. An excellent video and congratulations on your successful first drive. I was mesmerised by your machine - not that I understood it all of course!
Don't forget to also adjust the suspension height if needed. Even if it rides smoothly, ride height might be slightly too high (rear wheel completely apparent isn't right, its top needs to be slightly hidden by the rear pannel) I have the problem with mine : new spheres and bushes, domes etc...smooth ride on normal roads but bad filtration of holes and gaps. Taking it on a paved road triggers anxiety. And I realized not too long ago that the body actually was a bit too high in the "normal" road position. It makes sense, since filtration was better when accelerating (aka when the rear suspension lowers itself). Anyway, that might help your domes a little in case your normal ride height is indeed a bit too high.
The Hydractive ECU is not actually waking up when you were driving. That notification is just telling which suspension mode is selected when you start the car or use the mode switch. Because the XM’s info display works in sort of “priority mode” it always displays the most critical error as long as it’s there or it might cycle them I can’t remember right now. As you were driving it, it decided that all the bulbs were ok it then showed you the setting of the suspension, which it would have showed at the start if there were no other info to share. I hope this wasn't too poorly explained :D
As someone who has had a “bulb error” recently, I can confirm that the suspension mode isn’t displayed on start up if bulb error exists, but only once the bulb is corrected. I think the logic behind not cycling the bulb error and suspension mode is because the suspension mode is also indicated by a light in the top left of the cluster. Which by the way, I didn’t notice functioning in this video.
Makes sense! had so many errors that this was the first time seeing the suspension setting on that display... was wondering if nothing would tell you which mode the suspension was in actually... but it sounds like a got a blown bulp for the dash indicator then? :)
@@SeasideGarage it’s possible. To be honest I wasn’t looking extremely closely. The bulb comes on when the ignition is turned on (just like many others) to test itself, and like I said, it’s in the very top left. So if you don’t see it come on when you turn the key, the bulb is likely out. Unless the bulb not coming on could indicate another issue. It also illuminates when the sport suspension is selected.
Need to keep an ear on that diff whine, XM's should be almost silent save the engine itself audible but you are getting a "Mini whine" from the diff which could indicate trouble down the road but should be fine for the time being and just make sure oil gets changed in the box at service intervals.
Great to see that car on the road. The 24v engine will give its best above 4000rpm. Back in 1990 my dad was looking at a car of this value but it was a company purchase. I suggested an XM as I really liked them but his company wouldn’t buy one. Instead he got a Ford Granada (Scorpio) which was a really nice car to travel in and to drive once I was old enough. I’ve aways been intrigued by XMs though. By 1998 uk dealers were almost giving away XMs. I wasn’t brave enough to buy one though!
Om din xm føles litt mere audi og ikke citroen er den helt ok.min er likedan. Min C6 er også ikke så soft som min gamle cx turbo2. Tror de gamle cx modellene var de siste riktige citroens😊. Happy new year from norway
Strut top mounts do not just spontaneously fail.. there are clues and signs you can look for.. the main clue is in the front arches looking at the underside base plate, you can see the rubber start to split away from the base plate, so without checking them out first its a sheer guess.. Its a multivalve engine so the 200bhp is further up the power range so demands revs to get the best.. its a 0 to 60 in 7.5 second car!
This particular version isn’t really bad actually. It just so happens that all the plastic was in the shot. Other than the top of the dash, the very top, and very bottom of the doors, and ac controls, the rest of this interior is trimmed in leather and real wood. I will say though that any XM other than the 24 valve V6 has bit more plastic inside. Notably on the center console and the steering wheel.
If a ZPJ4 engine feels weak, it's usually caused by stuck ACAV (Admission á Characteristique Acoustique Variabele) valves. They adjust the length of the intake manifold, giving high torque at low revs and high power at high revs. There are 3 ACAV valves - 2 at the U-bend (controlled by one single solenoid, should be open at idle and closed up to 4000rpm) and one in the middle (controlled by another solenoid, should open above 5000rpm). You can test them by directly applying 12 volts to the solenoids.
It had an error code pointing towards that system so it is pretty likely that its stuck tbh! Pretty good information! thank you for that!
The most common issue is defective electrovalves. It's easy to check, both of them should operate at higher RPM. Just rev the engine and look if linkage from the black capsule moves the flap. Hint: There are two elactrovalves, one green on the top of the inlet manifold and one brown at the back of right corner, between AC compressor. Both of them are unavailable, but the brown one is exactly the same part number like on 2.5TD XM MK2 EGR electrvalve, and they're are usually good. So if yours is bad, just buy used one from 2.5TD.
There is a gentleman called Hein Gysen who is a wealth of knowledge in California about the CX and XM. He drives a CX that has 1 million kilometers on it. He has worked for Citroen for a long time.
Always a New Year bonus when you arrive back to your garage and the test drive didn’t set the car on fire 🔥😂, had my fingers crossed 🤞 the whole journey 😉👍🏻.
Yea! Its about celebrating the little things!
@@SeasideGarage 😂👌🏻
It could be 5 and 6 are leaky/worn injectors, or the rest are patially blocked, especially if you think it's running a bit lean. Chuck some injector cleaner in it anyway, or take it for an Italian tune up!
Good to hear it didn't burst into flames, always a good thing. The Sun tune machine brought back memories of working in a Mercedes/Porsche/Ferrari dealership in the late seventies. We used all kinds of wierd high tech stuff that looks like science fiction movies from the sixties now. Fascinating.
Ah! Should get an old Ferrari then! :D
this sun computer walked out of a buck rogers movie :) i adore your channel. as a experienced citro (cx, 2cv, and jaguar) driver it gives me great joy to see you (in stead of myself :) ) struggle with the weird french en english car designs. i like to keep the maintenance weirdness routines in a affordable en reasonable 2cv6 level. so that car is the only keeper in my classic wagonpark.
You can start the trip computer (the right side display showing the outside temp / current fuel consumption / avg. fuel consumption) by long pressing the button on the tip of the right side stick.
I've come to be fascinated by these weird Citreons because of this channel. Keep up the good work!
The front suspension mountings (domes) are not that expensive considering the risk you eliminate when you renew them, someone in Lithuania sells fully refurbished ones about €180 each since about 15 years, they have passed the test of time! For the time being, avoid turning the steering, that is what gives the domes the highest strain.
Just bought a pair of those lituanian domes from Technocitro (in France) and it only took a few hours to have them installed by a specialist. I'm now wayyyy less anxious when encountering roundabouts, speed bumps and tight turns.
'nothing is on fire...and that's a good thing!'. Lol, quote of the week😆🤣
What a nice BIG and old computer! Wonderful test.
When you switch from automatic suspension to sport suspension there should be an orange light in the upper left corner on the dash… most likely either a dead bulb or bad connection….
"Nothing is on fire!" I used to feel that way after completing a successful trip in my old 1966 Beetle.
I thought Seppo was overexcited about the XM but then I realized that the video was playing at 1.25x. XD
Alt for fedt, at dit fix virkede! Og SÅ cool at din tester virker! Da testen kørte lignede du en, der lige havde været til eksamen og ventede på din karakter. Lidt ligesom når man er til syn med en bil. 😊
Back in the '60's I had my Volvo B16 Amazon (6v) checked over on a Crypton machine. Not much to check but we were looking at the ignition. There was a test that allowed you to see on a graph how much current was being drawn when the plugs fired under compression. Found one was low. New plugs got them all even again. Did you fit new plugs to the XM? Maybe the 2 with high numbers aren't burning very well. Yes, dribbling injectors could mean over rich and incomplete burning.
Happy New Year!
Lovely car, i always think of that film ronin when i see one of these. Never had one, but who knows ,one day
Hi Seppo, really enjoyed this upload, one of your best I think, so good to see the Sun in action. Many thanks and happy New Year to you and your family
Thanks Chris!
Happy New Year to you. An excellent video and congratulations on your successful first drive. I was mesmerised by your machine - not that I understood it all of course!
Very cool seeing that car medical device in action and a very likely patient :D
Don't forget to also adjust the suspension height if needed. Even if it rides smoothly, ride height might be slightly too high (rear wheel completely apparent isn't right, its top needs to be slightly hidden by the rear pannel)
I have the problem with mine : new spheres and bushes, domes etc...smooth ride on normal roads but bad filtration of holes and gaps. Taking it on a paved road triggers anxiety.
And I realized not too long ago that the body actually was a bit too high in the "normal" road position.
It makes sense, since filtration was better when accelerating (aka when the rear suspension lowers itself).
Anyway, that might help your domes a little in case your normal ride height is indeed a bit too high.
That analyser is so awesome.
Top job Seppo. I think she needs an ‘Italian tuneup.’ 😃 cheers from Tasmania. The home of a certain prominent Dane. 👏
The Hydractive ECU is not actually waking up when you were driving. That notification is just telling which suspension mode is selected when you start the car or use the mode switch. Because the XM’s info display works in sort of “priority mode” it always displays the most critical error as long as it’s there or it might cycle them I can’t remember right now. As you were driving it, it decided that all the bulbs were ok it then showed you the setting of the suspension, which it would have showed at the start if there were no other info to share. I hope this wasn't too poorly explained :D
As someone who has had a “bulb error” recently, I can confirm that the suspension mode isn’t displayed on start up if bulb error exists, but only once the bulb is corrected.
I think the logic behind not cycling the bulb error and suspension mode is because the suspension mode is also indicated by a light in the top left of the cluster. Which by the way, I didn’t notice functioning in this video.
Makes sense! had so many errors that this was the first time seeing the suspension setting on that display... was wondering if nothing would tell you which mode the suspension was in actually... but it sounds like a got a blown bulp for the dash indicator then? :)
@@SeasideGarage it’s possible. To be honest I wasn’t looking extremely closely. The bulb comes on when the ignition is turned on (just like many others) to test itself, and like I said, it’s in the very top left. So if you don’t see it come on when you turn the key, the bulb is likely out. Unless the bulb not coming on could indicate another issue.
It also illuminates when the sport suspension is selected.
You should switch some injectors and see if the fault (high HC value) follows the injectors
So cool that computer test thingy.
Like your camera setup on the side window. Thinking of having something similar.
The best Xm zpj4!😊
Need to keep an ear on that diff whine, XM's should be almost silent save the engine itself audible but you are getting a "Mini whine" from the diff which could indicate trouble down the road but should be fine for the time being and just make sure oil gets changed in the box at service intervals.
Great to see that car on the road. The 24v engine will give its best above 4000rpm. Back in 1990 my dad was looking at a car of this value but it was a company purchase. I suggested an XM as I really liked them but his company wouldn’t buy one. Instead he got a Ford Granada (Scorpio) which was a really nice car to travel in and to drive once I was old enough. I’ve aways been intrigued by XMs though. By 1998 uk dealers were almost giving away XMs. I wasn’t brave enough to buy one though!
You should call that machine Hal... Then you can get freaked out everytime you use it! 🤣😂
Nice to play with thanks
A very nice test drive 😊👍
Its a great looking car
Godt nytår! 🎉
It would be fun if you will get a Fiat Regatta. Those were odd.
Yes thank you!
20 years ? That is a CRIME !
Godt Nytår!
Tak!
i will take a stab and say the two higher reading have dribbling injectors.... bottle of a quality cleaner might help there
Good idea...!
need different spark plugs maybe
What a machine
Om din xm føles litt mere audi og ikke citroen er den helt ok.min er likedan. Min C6 er også ikke så soft som min gamle cx turbo2. Tror de gamle cx modellene var de siste riktige citroens😊. Happy new year from norway
np skal nok bliver glad for den
Han får noget at se til med sådan en! :)
@@SeasideGarage Det tror jeg grene jeg kan jo godt huske dem var da man så dem på vejen
Strut top mounts do not just spontaneously fail.. there are clues and signs you can look for.. the main clue is in the front arches looking at the underside base plate, you can see the rubber start to split away from the base plate, so without checking them out first its a sheer guess..
Its a multivalve engine so the 200bhp is further up the power range so demands revs to get the best.. its a 0 to 60 in 7.5 second car!
Its a very quick car! at least on the paper! :)
Yea.. its not looking to good... could be worse too! but hard to say when it becomes critical...
On paper? It will do 60 mph in one gear change .. I'm not sure what you expect, but I was scared of mine.. 😂😂
@@Mr80sliveon impressive ! Can't wait to try it beyond 4000rpm!
Not catching fire is always a good thing, got to leave that job to the elon pintos... :P
Weird and controversial?
Nsu Ro80 perhaps
👍🔧
Now kick it out of garage and lock the doors, before this possesed car comes back :D
Written danish is not that much different from english or swedish. It's just how you speak that is difficult to understand.
God its plastic inside.
This particular version isn’t really bad actually. It just so happens that all the plastic was in the shot. Other than the top of the dash, the very top, and very bottom of the doors, and ac controls, the rest of this interior is trimmed in leather and real wood.
I will say though that any XM other than the 24 valve V6 has bit more plastic inside. Notably on the center console and the steering wheel.