my 94tt never idle very well since i got the car.(previous owner told me so) i notice the idle wanders between 500-700 and very few times it stalled when i was turning slowly. but now i experience power spike when i have the gear to the neutral idle rpm dips below 500rpm and dims my cluster lights and almost feel like it was going to stall. it wasn't this bad until recently. so i thought it was the battery issue since i was running with really old oem battery so i went ahead and changed the battery to optima red top battery. still same thing happens. so i went to check the battery, alternator, and starter from local shop. they all checked out ok. so what would cause this? i recently tightened the alternator belt(no more squeal!) and it tested charges good so i really don't know what is going on. any help will be appreciated!
--pantherZ
Follow Ups
idle and power issue... - pantherZ19:33:11 01/20/12