I think I'm with Innuendo on that one, it sounds like more than one issue to me. First is that the motor wants to 'run on', not a good situ, timing?... possibly, second is she 'rattles'; it does sound like timing and detonation, maybe... but it might be as simple as an inlet manifold leak.... grab hold of the inlet manifold and see if it's loose, sometimes they can do this after miles and miles, and you just assume its the same as when you did it up.
The standard (olds skool) diognostic tool for an engine like this is a vacumn guage, but if you've gotta be travelling in a week or so, and dont have one at hand, a trip to someone like dynatune will be faster and cheaper, as long as they are not gonna charge more than 50 bucks, and know you just want diagnosis.
Reply With Quote
Bookmarks