ISC, Boost leak, Plugs?

[skyhigh350]

Well that sensor will adjust up and down with a 14 mm wrench. I adjusted mine and it fixed my idle. It was unsteady and it made it steady. The tps will adjust air fuel mixture, but I am not 100 percent sure if it will effect what is happening to you.. You say if it is in gear than it idles at a normal state? Will it die down as soon as you pull it out of gear with the clutch in?


edit**
Also have you attempted adjusting the idle air screw? And have you timed your engine correctly?