have 1985 vw golf 1.3 petrol . Keeps burning points .Have changed coil and condenser also new leads.Burns points after doing roughfly 20 to 30 miles.Any help appreciated.
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Did this hunger for points coincide with anything else (new coil, change of distributor and plugs etc?)
First thing to swop/check would be the coil, but first check the wiring to it is not damaged and it is correctly located.
On some distributors the points sit on a plate which rotates on top of another plate, and the connection (and earthing) is made by a spring or a small braided connector.
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Does this have one of those cold weather starting resistors? (ala Ford?) That may have gone.
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That thought crossed my mind;you may be getting a permanent 12v. instead of 12v.for starting and 8v.for running.Won't do the coil any good either.Measure the volts on the supply side of the coil when cranking and when running.A car of that age may have a resistor coil(8v.)but I don't know about VW but I'm sure someone else will.
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I would expect a ballast resistor to fail open circuit but there does appear to be too high a voltage.Maybe the bypass circuit is operating when it should not be.
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Does the Mk 2 have a normal round coil or the cube thansformer type. If you have a round one make sure you have wired the switched feed to the coorect side of the coil and the CB to the distributer. The wrong running voltage may be your problem here so check it out and come back. Regards Peter
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I *think* these ignition LT circuits include a ballast resistor as RF suggested above. However, it's 15 years ago since I last worked on one of these ignition circuits!
It is possible that the ballast resistor has failed open circuit, and someone has "helpfully" by-passed it, giving the coil full battery voltage all the time, instead of only during cranking.
Another possibility is that the alternator is overcharging resulting in excessive battery voltage.
Yet another possibility is that a coil suitable for electronic ignition, with a lower primary resistance, has been fitted, instead of a coil suitable for contact breaker ignitions.
Number_Cruncher
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Further to previous post it appears the BR is a resistance wire.Could this have been replaced with ordinary wire during maintainance?
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Ford used a resistor wire,not a separate resistor.
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Indeed, and because the wire ran in a half-loop; it was a doddle to bridge, strictly as a get you home repair, you didn't even need to let in any new wire!
IIRC, the Golf also used resistance wire, but not laid out in such a simple way as the Ford implementation.
Number_Cruncher
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think if the cold start resistor had failed it would cause coil to burn out. Points burning sounds like poor distributor earth to me
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thank,s to everyone for their replys and help.I think number-cruncher, may have hit nail on head wrong coil fitted.thank,s again. If any more probs will come back to you.
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