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Strange high idle, common issues ruled out 140-160 1968

posted by  drj434343 on  Wed Aug 12 17:55 CST 2009
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last visit: Thu Oct 24 09:46 CST 2013
[RELATED]

I haven't tried a new set of carbs, mostly because they're hard to come by. I have tried forcibly blocking the air flow into the inlet, and it does drop very fast very quickly. I use ATF in the carbs. Is it possible to overfill?

My kick right now is the timing advance weights in the distributor getting stuck in some state of out. I'm thinking this because of the nature of the high idle. After sitting for a short while, occasionally it will idle normally until I go above 1500 RPM, then it will always idle high. Also, very occasionally, the idle will wander slowly down to 800 then wander back up to 1500. That doesn't sound like an air leak to me. I also know my distributor has too much axial play in its shaft.

I note in your signature that you have a ton of 140's. You wouldn't possibly have a B18 or B20 distributor you'd loan or sell me would you?






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