Idle Questions
 

two things. this morning when it was idling at a light it did this thing my MX6 used to do. it will rev the engine, then stall it then rev, the stall. it does this repeatedly until you press the gas to stop it.

the other thing is when i was coming home from work and idling in my drive way it would miss and fall down to 500 then pick back up. this happened repeatedly too.

would bad plugs be causing the miss?
i'm using 87 octane per this group's recomendation.

bump

Most common cause - a vacuum leak.
2nd most likely - less than perfect primary grounds.