91rx7 idle/exhaust question

[boosted13b]

quick question.....i have a exhaust leak in my cat and now im having rough idle and a slight miss fire it sounds ike but i think its just from the hole maybe could the be the problem?? other wise the car is all stock .....and everythings in spec and all sensors are good....i even changed the spark plug wires, plugs and coil packs

 

[boosted13b]

shoot me something

 

[melicha8]

Vacuum leak from your emissions rack. The exhaust leak will cause backfires but not a rough idle

 

[boosted13b]

i hmmm iwent through all the vac. no leaks

 

[melicha8]

Air control valve on the lower intake mani