Idle Problem

Toyota Trucks Make Specific
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Idle Problem
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stockflooredsdime
+1y
My buddy has a 89 Toyota with a 3.0 ltr 6 cyl.  Only when the engine is warm, the RPM's drop down a few hundred then back up.  It keeps doing this while idling. 
 
Any suggestions?
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1lonisn
+1y




Coolant is low.....


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