Question about Oldsmobile Alero
it sounds like a prolem on the vacuum pipes going to the inlet manifold.
a split in one of these vacuum pipes would result in too much air going into the engine, resulting in the exact symptoms you are describing.
check each pipe for any signs of damage or collapsing or holes. make sure that they fit tightly at the ends and at any junction points.
also remove the pipe going into the brake servo unit and blow into it. you should feel some resistance, and when the pressure is released, you should feel the air blowing back a little.
if you can keep blowing into this pipe with no resistance the diaphragm in the servo unit has a hole in it which will also let air into the manifold.
Posted on Apr 06, 2011
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Posted on Jan 02, 2017
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