Best way to clean intake manifold?

I've seen how bad the butterfly valve on a throttle body can get w/ carbon build up, and assume the inside of the manifold isn't much prettier. I'm gonna have mine off replacing gaskets and the fuel rail and wonder if there's a good way to really clean out the manifold? Or, is the best way to just run Sea Foam through the system when the engine's running? Thanks.

 

Letze: Sorry, don't get the Mustang reference (probably because I've never owned one). But wouldn't cleaning it and then adjusting the idle be the way to go?
Rye: I take it you're talking about putting a cleaner through it when it's assembled and running. I was wondering if there's any cleaning to be done while I've got the manifold off the car. If not, cool. If so, what's the best way?

 

TVIS is no turbo, but you should definitely feel it engage at 4100-4200 RPM. I know I do when everything is running properly. I don't know how much carbon build-up might or might not play a part of low or no TVIS kick-in. Besides the intake manifold, you've got the air intake control valve between the manifold runners and the cylinder head. Seems reasonable that carbon build-up could screw up the butterfly valves in there.

I've got leaks in both intake gaskets, leading to a low vacuum situation. Since TVIS is a RPM triggered, vacuum actuated system, a leak could be involved w/ a TVIS problem. My TVIS is engaging, but not to the extent it did before I developed the vacuum leaks (due, I believe, to the fact that when the engine was reinstalled twice, the shop lost/didn't reinstall two of the intake manifold stays and everything probably vibrated loose). So all new gaskets between throttle body and exhaust manifold and injectors off to Witch Hunter for cleaning, balancing, and flow charting.

I just figured I might as well remove all the carbon build-up I could while everything is apart (and hopefully never have to do it again).

 

Understood. However, most of my driving is not around town or stop and go. I've got a 45 mile commute to work along winding roads w/ only one stop sign and then on the interstate. So for me, off-the-line isn't nearly as often as dropping it a gear and feel the extra kick around corners and passing other cars. If I could have it both ways, obviously I would (turbo AWD?) but when choosing between low rev or high rev torque, I drive more in the high rev mode.