Our new to us 2008 sc with 450 miles started to act up on start up as follows. Turn key, engine rotates a second or two fires revs up, or not, then bogs and almost dies and revs up again and then stabilizes at 700 instead of the 1000 or so it did when cold on first starts. Seems to be fine after that. Cannot seem to find any similar posts for the 4.2 sc jag engine. Temps are near or at freezing mark wheras temps were 50f when we bought it. Could not find anything with search except non specific iacv issues being similar. Any info on where the iacv resides would be useful.