Citroen CX Auto Electrician
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  1. #1
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    Default Citroen CX Auto Electrician

    Hi

    My Citroen is a CX GTi which has an intermittent electrical issue.

    It has been with my usual mechanic for a month and he can't work out what the problem is.
    The car cuts out suddenly when being driven, there is an almighty jerk and then it keeps running again. Sometimes it'll happen all the time other times it'll run perfectly He is convinced that it's electrical but can't trace the problem as it goes away and then comes back. He has checked and replaced all of the wiring, replacing suspect pieces, and gone over the whole electrical system (coils, plugs etc etc) with a fine tooth comb....nothing!

    Can anyone recommend an auto electrician in either Melbourne or the Macedon Ranges who could do the necessary detective work to solve my cars problem?

    Cheers

    Herby

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  2. #2
    Real cars have hydraulics DoubleChevron's Avatar
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    pull the spare wheel out and remove the shrowd under it... big eletrical plugs under here will be dodgy. If it was flywheel sensors it would die for a while there is heat soak under the bonnet ... then work again perfectly.

    seeya,

    Shane L.
    'Cit' homepage:
    Citroen Workshop
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    '72 DS21 ie 5spd pallas (last looked at ... about 15years ago)
    '78 GS1220 pallas
    '92 Range Rover Classic ... 5spd manual.

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  3. #3
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    Sorry, I'm not too mechanical.
    How do I fix it once I've accessed the plug?
    Do I need to replace this plug? Use some contact clearer? Etc?

  4. #4
    Real cars have hydraulics DoubleChevron's Avatar
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    Quote Originally Posted by HERBYJ View Post
    Sorry, I'm not too mechanical.
    How do I fix it once I've accessed the plug?
    Do I need to replace this plug? Use some contact clearer? Etc?
    best fix is to probably chop the connectors out and solder the wires together

    seeya,
    Shane L.
    'Cit' homepage:
    Citroen Workshop
    Proper cars--
    '85 Series II CX2500 GTi Turbo I
    '63 ID19 http://www.aussiefrogs.com/forum/showthread.php?t=90325
    '72 DS21 ie 5spd pallas (last looked at ... about 15years ago)
    '78 GS1220 pallas
    '92 Range Rover Classic ... 5spd manual.

    Yay ... No Slugomatics


    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual

  5. #5
    Too many posts! JohnW's Avatar
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    I'm presuming it has a coil? I'd check for a break in the low tension wire from the distributor INSIDE the insulation. Not instead of Shane's suggestion, I'd add. It does sound like a key ignition circuit dropping in and out so a connector or a wire. Nothing loose at the back of the ignition switch??

    Do any lights come on in the dash when it cuts out?

    Can't offer more advice. Good luck!
    JohnW

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  6. #6
    1000+ Posts Ken W's Avatar
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    How does the tacho respond when the engine cuts out - does it fall to zero or does it stay the same? It is very difficult to track an intermittent fault like this - you almost have to instrument up the car and take it for a drive.

    Cheers, Ken

  7. #7
    IWS
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    Quote Originally Posted by HERBYJ View Post
    Hi


    Can anyone recommend an auto electrician in either Melbourne or the Macedon Ranges who could do the necessary detective work to solve my cars problem?




    T&J Auto Electrical 16 Lynch St, Hawthorn
    Phone: (03) 9819 2666

    They are old-fashioned auto electricians and they have experience with Citroen.

    Ian.

  8. #8
    Real cars have hydraulics DoubleChevron's Avatar
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    Oh ... I was assuming a later injected car. Also check the connections to the tachometric relay ... usually refered to as "big blue".

    seeya,
    Shane L.
    'Cit' homepage:
    Citroen Workshop
    Proper cars--
    '85 Series II CX2500 GTi Turbo I
    '63 ID19 http://www.aussiefrogs.com/forum/showthread.php?t=90325
    '72 DS21 ie 5spd pallas (last looked at ... about 15years ago)
    '78 GS1220 pallas
    '92 Range Rover Classic ... 5spd manual.

    Yay ... No Slugomatics


    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual

  9. #9
    1000+ Posts gerrypro's Avatar
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    Had a similar problem on my 78. Turned out that the fault was in the ignition condenser. Hard to source a replacement locally but ended up purchasing one on Ebay from a Landrover. They have Ducellier ignition.
    Cheers Gerry

  10. #10
    1000+ Posts gerrypro's Avatar
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    Another issue that saw me stuck on the Eastern near Melba tunnel for three hours turned out to be a bad load of fuel and a completely clogged filter screen on the fuel pick up and sender unit. It would sputter and stop and then after a rest would start again only to stall further along the road. By the time we reached the Springvale road over pass it refused to budge any further and ended up getting a ride with Nationwide to my son's place in Seville!
    Cheers Gerry

  11. #11
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    Hi

    Thanks for all of the suggestions. I think I'll try some of the easier fixes and see whether I can solve the issue myself. If I can't fix it I'll take it to the auto electrician that has been recommended.

    To re-cap.....

    The car is a 1983 CX Gti with fuel injection.

    When driving the car there is a sudden cutting out of the engine and then it keeps going as normal. It is quite a violent shudder which is sometimes there and continuous at other times the car runs perfectly. It can happen at idle or on the freeway, when the car is cold or hot. The tacho doesn't fall or alter as the shudder is so short. None of the dash lights come on when it cuts out either.

    My local mechanic has checked all of the obvious electrical parts, replaced suspect wires, plugs, coils etc etc and can't find a cause. He says it's not fuel, that it's definitely electrical.

    Thanks again for all of the suggestions.

    Herby

  12. #12
    1000+ Posts Ken W's Avatar
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    Herby,

    If the tacho stays pretty steady, then the primary part of the ignition circuit is probably OK. But there could still be an issue with plugs, plug leads or dizzy cap. Otherwise it is in the fuel injection. If it is cutting out at idle, try wiggling all parts of the injection loom and see if you con find any section that is more sensitive than the rest.

    Cheers, Ken

  13. #13
    Real cars have hydraulics DoubleChevron's Avatar
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    start the car and vigorously shake every wiring harness you can find. I be the car cuts and and dies as you shake one of them. this is the one you need to concentrate on. It will be connectors/wiring harnesses twising as the motor moves in it's mounts.

    Do you have twin transformer coils ... or a standard dizzie with an optical pickup ?

    seeya,
    Shane L.
    'Cit' homepage:
    Citroen Workshop
    Proper cars--
    '85 Series II CX2500 GTi Turbo I
    '63 ID19 http://www.aussiefrogs.com/forum/showthread.php?t=90325
    '72 DS21 ie 5spd pallas (last looked at ... about 15years ago)
    '78 GS1220 pallas
    '92 Range Rover Classic ... 5spd manual.

    Yay ... No Slugomatics


    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual

  14. #14
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    Hi Shane
    i'm fairly sure that I have transformer coils.
    Herby

  15. #15
    Real cars have hydraulics DoubleChevron's Avatar
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    Quote Originally Posted by HERBYJ View Post
    Hi Shane
    i'm fairly sure that I have transformer coils.
    Herby
    Yes ... it's just going to be wiring connectors then .... clean and replace all connector as required and I'm betting it'll be away!
    'Cit' homepage:
    Citroen Workshop
    Proper cars--
    '85 Series II CX2500 GTi Turbo I
    '63 ID19 http://www.aussiefrogs.com/forum/showthread.php?t=90325
    '72 DS21 ie 5spd pallas (last looked at ... about 15years ago)
    '78 GS1220 pallas
    '92 Range Rover Classic ... 5spd manual.

    Yay ... No Slugomatics


    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual

  16. #16
    Tadpole
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    G'day Herby,
    Had much the same problem. with my GTI. Doubtful if your bloke replaced all the wiring. Hope you are a millionaire if he did. Worth checking the connectors to the fuel pump. They are pretty fragile connectors, and lose their tension from vibration of the form. Mine had no tension at all, and were just touching mostly but not always. The Bosch connectors in the plug for the air flow unit give that problem too, for the same reason, also the connectors on the ignition sensors. The forms need to be secured so they don't move the connectors about when they move about. Specially the case with the Air flow unit and the ignition sensor forms. They both need to be tied down. That's the cause of them losing their temper . Bosch used to sell these little connectors in a string but haven't been able to get them lately. They are the same as the ones for the injectors, which they do sell as a unit.
    Easy enough also to remove the ignition sensors and heat in an oven while checking the continuity with some extension leads as they heat up. They give the same problem.
    Good luck. Worth the trouble. Len.

  17. #17
    Real cars have hydraulics DoubleChevron's Avatar
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    Make a quick list ... this sounds like an early car with glass fuses under the bonnet, but two tranformer coils and fuel injection.

    --Clean earth point above battery
    --remove both flywheel sensors... and bring to boil in a saucepan of water. There failure mode is generally they stop working when they get some heat soak into them. Put a multi-meter across there pins. They should stay somewhere around 60->100ohms ... they never leap to a high resistance value as they warm up. dependant on which one is failing, you will have a car that completely stops dead.... or one that suddenly runs extremely poorly.
    --find the tachometric relay. They moved it around, I'm not sure of the location on yours (on my '85 modle it's under the drivers side headlight). This powers the fuel pump and injectors while the engine is running.
    --the wiring harness plugs under the spare wheel ...
    --the spade connectors onto the temperature senders across the back of the head.
    --check the glass fuses haven't gone intermittant.

    The last CX2500 I had here would barely run. By just spending 20minutes cleaning the spade terminals across the back of the head and cleaning the big mulit-plugs ... it was instantly fixed.

    If it intermittantly drops back to 2cylinders... or runs on only 2 cylinders... this is a heat sensitive coil ... or dirty wiring connectors onto the coils.

    seeya
    Shane L.
    'Cit' homepage:
    Citroen Workshop
    Proper cars--
    '85 Series II CX2500 GTi Turbo I
    '63 ID19 http://www.aussiefrogs.com/forum/showthread.php?t=90325
    '72 DS21 ie 5spd pallas (last looked at ... about 15years ago)
    '78 GS1220 pallas
    '92 Range Rover Classic ... 5spd manual.

    Yay ... No Slugomatics


    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual

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