Vacuum leak?

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Remedy

New Member
87 carbed 1.5 looking for the source of erratic idle.

Checked all the stuff that was easy, then got out the carb cleaner and started spraying around. Got a rpm increase around the back side of the carb joint. I have read that they fail now and then, but I am not gonna tear it out and replace it based on that. Is it actually common or am I just projecting and the leak is probably something else? If it is the joint, will rtv seal it up?
 
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