Hello, so I recently put my engine back in from having the long block freshens up. I finally got it put back together. now it won't rev correctly at all. I've put new spark plugs in and that's the only thing i've done different electronic wise. the car revs terribly between 1 and 2 grand. and the tack gauge shakes between 1 and 2 thousand rpm. it runs better with the mass air flow sensor unplugged. but with a different mass air flow it runs just as terrible. can someone please help?
