Originally Posted By Crizila
Originally Posted By Supercuda
Because they had info online on how to add ported vacuum to a 97 before they started making them that way.
or you could just tap in to the intake manifold and run manifold vacuum.


Yep, I just did that in my truck to get more timing at idle. So far it's working great.

You need to make sure that the vacuum advance kicks in below whatever vacuum you have idling in gear (if automatic), and make sure that your total timing is good.

I can go into more detail if there's interest.

If you ever find yourself in a fair fight, your tactics suck.