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Re: Blowing fuses [Re: Anza A.] #782593 08/25/19 10:56 pm
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Nick H Online Content
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Sparking at the points themselves is a symptom of a failed condenser. They do not have a long shelf life.


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Re: Blowing fuses [Re: Nick H] #782596 08/25/19 11:28 pm
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quinten Online Happy
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Quote
When running with the point cover off the lower points/right side appears to make a much more visible spark than the other.


+1 ...What nick said

Replace this sides condenser. ... hell buy a pair , you dont need to replace the old good oone ... but its nice to have a spare around .

Explaining why is complicated.
A simple ... half right explanation is the condenser
Helps snuff the arc across the points as they open ... extremely quickly .
The points , as a switch operate more efficiently ...and with less wear and tear .

The voltage saved from being wasted as a spark accross the points .
is then returned to the coil as a a resonant connection .

The voltage saved and returned. By the condenser is also above primary voltage .
Because its dealing with the voltage spike generated by the primary currents collapse .
It does not seem like much ... but its an important job .

Re: Blowing fuses [Re: Anza A.] #782630 08/26/19 4:27 am
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Y'all remind me, when did they go to the 6CA system?
In any case, if it has the condensers under the seat, the mounting was made with the triples in mind. Gives you a handy place to carry a spare condenser.


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Re: Blowing fuses [Re: Anza A.] #782633 08/26/19 4:59 am
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Anza A. Offline OP
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New condensers on the way!

Re: Blowing fuses [Re: Anza A.] #782904 08/28/19 8:49 pm
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Anza A. Offline OP
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Well I tried a new condenser, including swapping condensers with the functional left cylinder, and no difference. New points and spark plug wires as well. It seems to be backfiring/ firing sporadically quite a bit while running, which only happens with both plug wires connected. When I pull the left plug wire while running it immediately dies. The coils are new, and I’ve ran the left cylinder off the right coil and it’s fine. If I run at slightly higher RPM it seems more likely to fire occasionally, so still seems like an ignition issue. I’m running out of things to check though...

Re: Blowing fuses [Re: Anza A.] #782917 08/28/19 9:49 pm
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Run two independent wires from the negative side of the battery to the negative side of the coils, thus replacing the wire from the ignition switch. Only thing is you will have to pull the wires to kill the ignition. Use insulated terminals for this.

Or try a new link wire between the coils and putting the wire which is going to the good coil onto the other and have the other as the linked coil... assuming that it is the coil that is fed first which is the good one?


beerchug
Re: Blowing fuses [Re: Anza A.] #783000 08/29/19 5:13 pm
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That makes sense, I'll give it a try in a few days. I checked the ground wires from coils to points and they were fine.

Re: Blowing fuses [Re: Anza A.] #783227 09/01/19 5:41 pm
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Anza A. Offline OP
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Well the Firebirds running on 2 cylinders again. Turned out to be a bad connection to one of the condensers. Thank you all for the troubleshooting help. On the bright side I learned a lot about the electrical system.

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