Toyota 1975, Contact breaker points pitted.

Tiny
MARIOC68
  • MEMBER
  • 1975 TOYOTA COROLLA
  • 860,000 MILES
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The Contact breaker points of my 1975 toyota corolla are pitted. The point of the hammer has a hole portion and sets this material as a kind of bulge.

The change of platinum and new capacitor did not last long as the points are burning fast as me in a couple of weeks.

I hope you can help me.
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Friday, December 25th, 2015 AT 8:04 PM

11 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
Most breaker point systems are designed to start on 12v and run on 8v so if you have modified the wiring or ignition system in any way, it would burn the points. Some vehicles use a coil with a resister built in and some use a resister wire to feed the coil to lower voltage once started.
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Saturday, December 26th, 2015 AT 7:26 AM
Tiny
MARIOC68
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Adding another capacitor?
I measure the resistance of the primary coil circuit? Or secondary or both?
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Saturday, December 26th, 2015 AT 3:14 PM
Tiny
WRENCHTECH
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There's nothing you can measure. Most coils are marked either internal resister or external resister.
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Saturday, December 26th, 2015 AT 3:19 PM
Tiny
MARIOC68
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How to test if the coil is going well or not?
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Saturday, December 26th, 2015 AT 3:24 PM
Tiny
WRENCHTECH
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I don't have any specs on that. It's too old.
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Saturday, December 26th, 2015 AT 3:36 PM
Tiny
MARIOC68
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You can place some additional resistance coil externally?
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Saturday, December 26th, 2015 AT 3:40 PM
Tiny
WRENCHTECH
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You can buy ignition resisters at the parts store if they still carry them but remember it has to start on 12v and run on 8-9v so you have to have 2 different feed wires to the coil.
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Saturday, December 26th, 2015 AT 3:43 PM
Tiny
MARIOC68
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According to its manual primary winding resistance should be 4.7 ohm. However the multimeter reading gives me only 3 ohm.
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Thursday, December 31st, 2015 AT 1:11 AM
Tiny
MHPAUTOS
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From memory this ignition system should run a ballast resistor and the coil should have printed on the base "use with resistor.
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Thursday, December 31st, 2015 AT 5:05 AM
Tiny
JOHNNY G.JR
  • MECHANIC
  • 320 POSTS
? I have seen where a bad ground on distributer can burn points, true or false?
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Saturday, June 18th, 2016 AT 7:39 PM
Tiny
MHPAUTOS
  • MECHANIC
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May just be a faulty condenser this will cause the points to arch
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Saturday, June 18th, 2016 AT 11:16 PM

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