One Ten V8 Starting Problem





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  1. #1
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    Default One Ten V8 Starting Problem

    Good day. I have an early One Ten V8 with carbs that is giving issues to start after driving it for a while. Initial starting is not a problem even if I go for days without driving it. But after driving around and cutting off engine, I will need to give it 20-30 minutes for it to restart. What could be the problem? Battery is old (March 2016), but wouldn’t the problem show at first start?

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    Default Re: One Ten V8 Starting Problem

    Which ignition (electronic or points), which carbs (SU or Stromberg)?
    '89 LR 110 V8

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    Default Re: One Ten V8 Starting Problem

    Quote Originally Posted by Mike N View Post
    Which ignition (electronic or points), which carbs (SU or Stromberg)?
    It has SU carbs and points.

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    Default Re: One Ten V8 Starting Problem

    Sounds if the carbs are peculating after you switched off . Check the float levels on the carbs maybe needle and seat issues not sealing properly too .

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  6. #5
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    Default Re: One Ten V8 Starting Problem

    I’m not sure the carbs are percolating, or it wouldn’t start easily after a long stop. Sounds heat related, somewhere.

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    Default Re: One Ten V8 Starting Problem

    Quote Originally Posted by Andrew D View Post
    I’m not sure the carbs are percolating, or it wouldn’t start easily after a long stop. Sounds heat related, somewhere.
    Hi Andrew from my understanding is tha
    t when you switch the engine off there is a substantial heat built up under the bonnet .This causes the fuel in the carb to change into a vapor form that makes the mixture too rich should you start after a short stop . However when standing for a longer period the vapor evaporates and the engine will start . Just my 2 C worth im sure there are more technical people that can explain it better .

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  9. #7
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    Default Re: One Ten V8 Starting Problem

    I would say valve clearances. When last did you check them?
    2014 LC76 4.5 V8

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  11. #8
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    Default Re: One Ten V8 Starting Problem

    Quote Originally Posted by Twist View Post
    Good day. I have an early One Ten V8 with carbs that is giving issues to start after driving it for a while. Initial starting is not a problem even if I go for days without driving it. But after driving around and cutting off engine, I will need to give it 20-30 minutes for it to restart. What could be the problem? Battery is old (March 2016), but wouldn’t the problem show at first start?
    Maybe the fuel cap breather blocked creating a vacuum?

    Regards,
    Suid-Wes
    2006 Defender 110 Td5

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  13. #9
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    Default Re: One Ten V8 Starting Problem

    Thanks gents. From the suggestions being thrown around it sounds like it’s not something as simple and straight forward as I was hoping. This is way above my abilities, so will check it in.

  14. #10
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    Default Re: One Ten V8 Starting Problem

    Maybe it is the battery after all? Battery on its way out, heats up while driving and then first have to cool down to produce enough power to start.

    Or some other electrical connection heating up and losing contact.

    This can keep you busy for a while ...
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  15. #11
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    Default Re: One Ten V8 Starting Problem

    Quote Originally Posted by smarty View Post
    Hi Andrew from my understanding is tha
    t when you switch the engine off there is a substantial heat built up under the bonnet .This causes the fuel in the carb to change into a vapor form that makes the mixture too rich should you start after a short stop . However when standing for a longer period the vapor evaporates and the engine will start . Just my 2 C worth im sure there are more technical people that can explain it better .
    100% correct. Mine did the same. I owned her for 12/13 years.

    It's all about the heat. In the old manuals LR shows a vapour trap on the firewall in the engine compartment.

    I did want to build a heat shield to stop this but never got to it.
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    Default Re: One Ten V8 Starting Problem

    Precisely why I wanted to convert to EFI.
    2012 Jeep Sahara Unlimited 3.6 V6
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  17. #13
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    Default Re: One Ten V8 Starting Problem

    If it still have points the fuel pump is most probably at the filter next to the chassis below the drivers feet. That pump sometimes caused suction issues, in that it could not get the fuel sucked from the tank without forming vapour locks as there was heat spill-over from exhaust, engine and gearbox after a hot run. One of the reasons the later fuel pump was moved to inside the tank where vapour locks could not form. But first check where your fuel pump is located :-)
    '89 LR 110 V8

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  19. #14
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    Default Re: One Ten V8 Starting Problem

    My money is on vapour lock in the pipes to the carbs. If they run past/near the exhausts they will boil off internally and then the next start has to fill the pipes with fuel before the carbs get fed.
    A small bore return line from the carbs to the tank will resolve that, if the pump is up to the task, or wait after turning on the key for the regular pump to fill the line again.

    FWIW, my P6 with the 3.5 is notorious for heat soak starting issues and sometime even affecting running if it's hot enough outside.
    Cheers,
    John

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  21. #15
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    Default Re: One Ten V8 Starting Problem

    If it is a twin carb su hif44 then it should already have the return pipe. standing at the radiator and looking towaeds the engine the right hand carb gets fed first and then the return is on the left hand carb.

    Have you tied changing the rotor arm - I had a similar problem which was a fault with the Rotor arm - Do NOT use interpart one - get proper Lucas one.

    Good luck.
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