Question about 1993 Saturn SL2
Where is the routing for the vacuum hose?
Where do the signal for rpm drop?
If this is only at idle you might want to check the idle air control valve for malfunction. Outside of that you're on the right track with the vacuum lines. I usually start with the one going from the brake booster to the manifold. If they all visually appear to be connected and undamaged get a can of carb cleaner or starter fluid or the like and spray a little bit around each hose one at a time. If the idle changes when sprayed you've found your leak!
Posted on Nov 04, 2010
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Posted on Jan 02, 2017
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