first question is why does my car boggs like it's gonna die after i switch my old battery for a new red top Optima espcially while in first gear at low rpm while driving and about to shift to 2nd and so on in every gear, i'm not sure if it's b/c of maybe it doesn't have any good ground connections or maybe it's b/c of the spark plug wires... and second question is how do i adjust the idle so it'll be lower b/c it's at 1500rpm all day....

 

i did a quick search and found out that it might be the IAC, i'll try to take it off and clean it w/ carb cleaners to see if it helps..

 

couldn't find the throttle adjuster..anyone knows where it is in a SC300 5 speed?