simplsi

Hey guys, Start off with the problem in as much detail as possible, it's pretty simple really, car runs fine after warming up, turn on radio idle goes down a little, turn on fog's idle goes down a little more, turn on heat and idle goes down even more, try the headlights and risk stalling the car.
details on the car, LS/vtec pretty much fully built all motor, really the cams make it idle funny, but have been tuned to stay pretty steady and not surge and jump at all, unless idle is drained by the electrical current.

I do realize that this happens on pretty much all cars, it's just very very aggresive on my certain car, it nearly stalls out when I have the headlights on, and am at a light holding the brakes.

I replaced the battery with a battery that has more CCA and AH, thinking maybe that might do the trick, didn't help at all. My radio has a feature that can check the volt meter on the battery and display it on the headunit ( I used to think it was bs and just for the Cool Factor and never used it, but i actually checked the voltage with a real volt meter, and the damn radio thing is correct.) What the meter is reading is 13.8-13.9 while the car is running with no extra devices turned on, when the fogs go on it's a constant 13.6-13.7 add the headlights it drops to about 13.3-13.4 add the heat and maybe brakes it will be approx. 12.9-13.0 sometimes it goes to less.

what i think is, not the battery, not the alternator, maybee i should just bump my idle up and it would fix the problem of course, but i would be idling at 2k, so any input before I do that would be greatly appreciated. thanks, Brian.

onefastx

your altenator belt may be bad, your altenator may be bad, or you may have a bad ground. i would put my money on the belt though becuase it happened in my crx

simplsi

will check when i get home, thanks.