I found out why my car has been running poorly lately....I had a vacuum leak. One of the vacuum caps was falling apart and cracked. The sad part is that I put this vacuum cap on the upper intake when I rebuild the engine only 2 years ago and it's rotten already. So my question is...who makes good vacuum caps these days ,that will last more than a few years?? The ones I had were from NAPA and say made in China.
Go to junk yard and pull some late model OEM ones...