trouble with my 98 navigator
 

my 98 navigator seems like its going to stall when the rpms drop below 1000, I changed the spark plugs and coil packs and still does it. it runs great when driving down the road. thank u

IAC - idle air control - maybe?

Ditto Dat! :)

would the check engine light come on if it was iac?

Yes if it was an electrical issue, but not if the mechanical portion was dirty and sticking, which is usually the case.

Maybe the infamous PCV elbow vacuum leak?

Vacuum leaks tend to raise the idle and not cause stalling thanks to the extra air flow.

Just changed the iac and still idling rough doesn't seem as bad but still bad enough any other idea?

Maybe the infamous PCV elbow vacuum leak?