i have a 1989 mazda 626 lx touring sedan and i have 2 questions. first, what is the spealer size in the rear? i have a hatchback and the crutchfield.com website said i had 6 1/2" round. is hat right? i dont remember. and also, i saw a service bulliten about my model of car idleing a little rough when in drive and sitting still. mine does that. i dont know why. she runs great though and all the belts are new and i have replaced lots of stuff but i dont know what the deal is. also, she shifts great too. just idles rough a little. thank you for your help.

id about the speakers (i have a 2000, and they are 6x9's) but i would take crutchfields word for it. About your idle. You might wanna check wires, distributer (not sure if cap and rotor apply to this year) but that too, and basics. Also, you can adjust your idle also. I dont know where it is on that year 6, but follow ur throttle cable to it. hope this helps.