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Misfire after 30 minutes  Rate Topic 
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 Posted: 05-11-2016 02:53 pm
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UKJames
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You mentioned the coil is too hot to hold for any period of time, either there is increased resistance in the circuit (plugs/gaps, dizzy cap gaps, lead starting to beakdown) or the coil resistance has gone to pot. I've got a lucas gold and it gets a slightly warm, max. Have you tried swapping the coil out?

Last edited on 05-11-2016 02:54 pm by UKJames

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 Posted: 05-11-2016 03:00 pm
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subwoofer
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60 degrees after 45 minutes shouldn't be an issue, the inlet manifold was much hotter.

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 Posted: 05-21-2016 10:57 am
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subwoofer
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Back from an hour mixed-traffic testing, not a misfire in sight after replacing rotor and dizzy cap with fresh (and rivet-less) items. Grand sum total for fix: 16£

HAPPY!

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Joachim

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 Posted: 05-21-2016 11:19 am
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UKJames
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The cheap fixes are always the most satisfying! Glad you got it sorted.

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 Posted: 06-05-2016 11:39 am
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subwoofer
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Still working and rapidly building confidence, not scared of city traffic anymore.
The more I think about it, the more likely is it that the problem was building ever since I installed the engine. Really happy that it looks like it's fixed.

Has anyone rebuilt a Smiths voltage gauge, btw? Mine is reading all over the place.

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Joachim

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 Posted: 06-05-2016 10:35 pm
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gmgiltd
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No idea about reconditioning the gauge or even where you would source parts if they were needed. New ones are availability from Merlin in the UK if you are stuck.
https://www.merlinmotorsport.co.uk/p/smiths-classic-voltmeter-gauge-52mm-diameter-cb-v
Gordon

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 Posted: 06-06-2016 09:47 am
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UKJames
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I've not delved into the inner workings of a volt gauge but have managed to bring back to life the tach and fuel sender, it is probably a fairly simple mechanism, a good clean and reassembly may well do the trick?

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 Posted: 06-06-2016 08:37 pm
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Tom Bradley
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Before replacing or rebuilding the voltage gauge, you might want to check the ground connections on the back of the instrument panel. Loose connections turned out to be the problem back when I had jumpy gauges. The way the ground was connected on mine was pretty sloppy and unreliable.

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 Posted: 06-06-2016 08:44 pm
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subwoofer
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Doesn't sound unlikely, actually. It seems to read right right after starting up, reading 1-1.5V low after a while.

Edit: missing half a sentence

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Joachim

Last edited on 06-06-2016 09:17 pm by subwoofer

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 Posted: 06-06-2016 08:57 pm
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answerman
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I don't think there is much that even can be rebuilt on the gauge. For what it's worth, I do have one I pulled out of my bits car. I can test it to see how it reads and if it passes, I'm sure we can work something out.

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 Posted: 06-06-2016 09:20 pm
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subwoofer
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Not really a priority, knowing it reads wrong after a while is ok, may look into it after rewiring the car, or it may have to give up the space for an oil temp gauge instead. Much more useful info really.

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