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Thread: 6 cyl rover starting issue

  1. #1
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    6 cyl rover starting issue

    Hi All,

    I have a 1978 ex mil SIII rover 6 that normally runs quite well. It has been laid up in a relatives (land rover addict) farm shed for 6 months while I sold / moved house.

    On the weekend, I started it first go and drove it out of the shed to bring home. After letting it idle for 2-3 minutes while I opened up the canvas, it stalled. It then would nearly fire, but could not get it to run properly.

    I checked the leads, cap and plugs (it has electronic ignition). Replaced the fuel. Undid the fuel hose and turned on ignition - it pumped.

    My suspicion is that the carby (CD75) has blocked or gunked up. Before I pull this off, are there any simple field fixes that may help. I did not even have a can of 'start ya bastard' to try.

    Given that it ran beautifully for the first 2-3 minutes, I suspect fuel side is the issue.

    Thoughts??
    Thanks

    Tim

  2. #2
    Homestar's Avatar
    Homestar is offline Super Moderator & CA manager Subscriber
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    Hi Tim, it sounds as though your suspicions may be right, but when you checked the ignition, did you check for a good spark? The electronic ignition should throw a nice fat blue spark across your plugs. Just thinking somethin to do with the ignition may have broken down a bit, so worth a check, although fuel sounds more likely in this case.

    If you managed to get it running just a bit, I used the old trick on my old carbied cars of sticking my hand over the carby to create a large vacuum in the inlet manifold - this sometimes dislodged some crud that was making the car run rough and occasionally did the trick.

    You need to get it running to do this, so I'm not really that much help am I...

    Hope you get it sorted - I'd love to have a look at it one day - I'm curently rebuilding a rover 6 for me Sons series 3 project. I'm one of the few people left that seem to like these engines as they run so smooth (when they are going).

    Cheers - Gav.
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

  3. #3
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    Thanks Gav,

    It normally runs really well, but I didnt have many tools or parts with me to help get it going. Will let you know how it goes.
    Thanks

    Tim

  4. #4
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    Doese it have a Solex S U , if so I would be checking the diaphragm in the top of the carby, after sitting it could have gone hard or split once the piston moved. while you have the top off you could blow through the jet.

  5. #5
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    Stale fuel!!!
    I know you said it has been sitting for six months, but how long before that did you put juice in it?
    This modern fuel goes off rather quickly and will block taps, jets etc.
    Today I drained some out of vehicle that has been sitting for a while and it was rank.


    Cheers, Mick.
    1974 S3 88 Holden 186.
    1971 S2A 88
    1971 S2A 109 6 cyl. tray back.
    1964 S2A 88 "Starfire Four" engine!
    1972 S3 88 x 2
    1959 S2 88 ARN 111-014
    1959 S2 88 ARN 111-556
    1988 Perentie 110 FFR ARN 48-728 steering now KLR PAS!
    REMLR 88
    1969 BSA Bantam B175

  6. #6
    ROMAROVER Guest

    six cylinder

    Quote Originally Posted by Homestar View Post
    Hope you get it sorted - I'd love to have a look at it one day - I'm curently rebuilding a rover 6 for me Sons series 3 project. I'm one of the few people left that seem to like these engines as they run so smooth (when they are going).

    Cheers - Gav.
    I like em too

  7. #7
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    The standard Stomberg CD carby has a rubber diaphragm which can perish/crack - simple and cheap to replace.

  8. #8
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    Quote Originally Posted by Homestar View Post
    I'm curently rebuilding a rover 6 for me Sons series 3 project. I'm one of the few people left that seem to like these engines as they run so smooth (when they are going).

    Cheers - Gav.
    Yeah I love them too. I have my second. I had a Series II with a 6 in it and now I have a SIII 109 Station Wagon with a 6 pot. They are very smooth when they are running right. My SIII was sitting in a farmers shed for a few years not moving but he used to go out and run it occasionally. She runs very rich now so I think the carby needs a look over. I also have the problem of stale fuel.

    Cheers

    Steve

  9. #9
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    So....

    Its been a while since the original post - I have been flat out on the house, but the SIII still not running.

    So far I have replaced leads, new plugs, new coil, drained fuel. The carby has been stripped and cleaned out (it looked ok anyway). Fuel is pumping well to carb. Distributor cap and rotor swapped with spares. Timing OK. There is a yellowish spark, so that is not a good sign. Timing light fires ok though.

    This time it is trying to start but stumbling and preigniting - usually an ignition problem. Sounds suspiciously like the electronic ignition module is breaking down - there is nothing else left. It is not working with aerostart, so it is not fuel related.

    I will put the points back in next time and see how that goes. If this works I will replace the module. Getting close I suspect.

  10. #10
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    Its Going now.

    It turns out that the main shaft in the distributor had a collapsed shim. The end float was 9mm! (meant to be 0.1) and the rotor wasnt transferring spark to the cap. Let's just say that a lot of parts were checked and replaced before I figured that out.

    Bought a new Lucas Distributor from SimonBBC with an electronic ignition kit, put it in by sight only and it started first go and ran smoothly. I now have to tune the carby again and properly time it with a light. I have a good 2 hours of work under the hood, putting it all back together now. The best $150 I have spent on the car.

    Items I checked :
    Coil (replaced)
    Leads (replaced)
    Plugs (replaced)
    Cap (replaced)
    Rotor (replaced)
    Carby (rebuilt)
    Vaccuum Advance (new)
    Radio Supressor (new)
    Coil 12V supply (hot wired out window)


    May get the Bosch distributor rebuilt, however it is 40 years old.

    Thanks for all advice along the way.

    Tim

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