First thing I would look for in this instance would be a vacuum leak on the engine. Check for it while the engine is running. I like to spray brake wash around areas of the engine to see if the engine rpms change and then concentrate on that area to help locate the leak.
First thing I would look for in this instance would be a vacuum leak on the engine. Check for it while the engine is running. I like to spray brake wash around areas of the engine to see if the engine rpms change and then concentrate on that area to help locate the leak.
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