86 tercel spark knock

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  #1  
Old 06-19-05, 11:28 AM
DavidAlan
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86 tercel spark knock

86 tercel with 1500 cc engine that has gradually developed a significant spark knock. I started with changing the cap/rotor/plug wires and plugs. it worked beautifully for two days. Now there is the start of spark knock, about half of what it was. I noticed there was rust colored dust on the inside of the old distributor cap. The old plugs had a large amount of whitish buildup that I was able to flake off.

What should I be looking for as the cause of the return of the spark knock and does the rust dust on the inside of the cap raise any alarms?

Thanks

Dave
 
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  #2  
Old 06-19-05, 04:37 PM
Join Date: Jun 2002
Location: Long Island, NY
Posts: 1,531
The rust is from the mechanical advance weights, they need to be cleaned and lubed. They could be sticking causing your timing to be off.

You would need to remove the dist, dissemble, clean and lube the weight system.
 
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