idle starts low on cool engine.. somtimes way low (i've read a topic somewhere that starts on high revs).. after awhile idle starts to normalize.. but the engine sometimes stalls eveytime i slow down to a stop.. almost always on sudden stops.. especially when a/c is turned off.. but it's better when headlamps and a/c are on.. though sometimes it still seems it's going to stall because of low rpm.. my rpm gauge doesn't even point right.. idle is obviously at around 500-600 rpm (or lower) but it points at 1500-1700.. hope anyone can enlighten me about this before i start with the tips from other posts here like cleaning the iacv.. thanks!