runtwrestlin

iTrader: (3)

I have a 98 LS1. It's been acting kind of funky at idle recently. It idles somewhat rough and will surge about 300rpm when I'm idling in drive, but if I turn the AC the surging stops and it seems to idle a little smoother. Some people told me that air was leaking in somehow. I just changed my intake gaskets, so I know it's def not them.
However...when I was changing the gaskets and had the manifold off, I noticed that the back part of the intake, where the MAP sensor and the big and little vaccum hoses plug, seemed to rotate a little. Not much, but some. I don't think this part is sposed to move/turn at all, so could it be the cause of the air/vaccum leak?

teke184

iTrader: (5)

could def be the problem.

and just because the intake gaskets are new, doesnt mean they aren't the problem either.
you could have torn one, knicked one, folded it over, or just plain had a bad seal to the heads.

runtwrestlin

iTrader: (3)

Ya...that's what I was thinking/afraid of. Would I need to replace the entire intake, or is there a way to replace that part/repair it so it's no longer lose?

Thanks for any suggestions