I've started noticing some roughness in idling at stop lights. Have 26K on an '03 Dmax. No surge and the roughness is not bad but noticeable and does not occur all the time, occurs more frequently when cold. I noticed on another site some posts concerning this maybe 5-6 months ago but never saw any followup posts about whether it resolved, worsened, or idenitification of the cause. Anyone else experience this and determine the cause?