When i come to a stop and i push in the clutch, the idle drops to the point where sometimes the car shuts off or it gets really close to shutting off. When this happens my voltage drops from 13.9 to 12.0. I already changed my spark plugs and wires.

 

do you have a lightened flywheel?

 

WTH does spark plugs and wires have to do with charging system voltage????

IF the car is idling extremely low then it is causing the alternator to not spin fast enough to provide needed system voltage, the rotor in any alternator must be rotating at a certain speed in order to begin charging.

Your problem is likely lack of tune or bad IACV causing the crappy idle.

 

I do have a lightened flywheel but I've had it for a while now and never had the problem before.

 

probably a dirty iacv just clean it out wit brake cleaner fluid and see wut happens.

 

ok so i cleaned my iacv and now my car idles even lower and it turns off, so its even worse. what could it be?

 

I checked some other threads and it said to clean the throttle body and sensor. So i did it any now my car idles high instaed of low

 

I would also like to know the answer to this high to low idle issue. Keep in mind that idle should be at 750+- 50. What is yours at?

 

right now its idling at about 1000 and some time after ive been driving and i come to a stop the idle will stay at about 1500-2000.