Many times when a MAP sensor goes bad its signal gets noisy with vibration. It is very hard to pick this up on a simple meter. A scope is really needed to see this type of problem.
bringing back a old thread I know, but has anyone used the MSD from advance auto parts? part number 2313. I would use Erik at turbo tweak but he is sold out at the moment and I have an advance gift card so I might as well use it.