Doof 11 Posted October 14, 2006 My 1.6 Gti has never idled too well, it tended to waver up and down around a 1000rpm. Anyway this i can live with but the stalling is starting to annoy me. Its definitely related to electrical load, if i have the lights on and the radio then i can stall it by turning the fan up to full. Is this caused by the alternator not providing enough juice, or is it maybe the battery? Any thoughts would be great. Lewis Share this post Link to post Share on other sites
James_m 0 Posted October 14, 2006 Try another AFM/usual idle fixes. Sounds like the already poor idle is being pushed over the edge from the extra loads from the alternator Share this post Link to post Share on other sites
huxley309 0 Posted October 14, 2006 it's definetly the voltage regulator on the alternator giving up ive had this happen on each of the gti's ive owned try driving over 3000 rpm and switch everything on, im willing to bet she doesn't cut out Share this post Link to post Share on other sites
Doof 11 Posted October 14, 2006 Yes obviously when driving normally its fine. Its just when i dip the clutch it happens. Whats this voltage regulator? Can i replace it? Share this post Link to post Share on other sites
huxley309 0 Posted October 15, 2006 not that i know of Share this post Link to post Share on other sites
Anthony 1,003 Posted October 16, 2006 Nothing to do with the voltage regulator in my experience. It'll be your idle mixture isn't set up properly, and prehaps the throttle stop/speed needs adjusting as well. Clean out the AFM and throttle body with carb cleaner, unscrew the AFM mixture screw a few turns, check it's idling around 900rpm with full electrical load (main beams, heated rear screw, fan on full speed) and I bet you that it'll be a damned sight better Share this post Link to post Share on other sites
PumaRacing 2 Posted October 16, 2006 My 1.6 Gti has never idled too well, it tended to waver up and down around a 1000rpm. Anyway this i can live with but the stalling is starting to annoy me. Its definitely related to electrical load, if i have the lights on and the radio then i can stall it by turning the fan up to full. Is this caused by the alternator not providing enough juice, or is it maybe the battery? Any thoughts would be great. Lewis The idle mixture will be far too rich or too weak, probably the latter. Check for split hoses, air leaks at gaskets etc, exhaust cracks and then get the mixture set up properly. A compression test wouldn't hurt either. Share this post Link to post Share on other sites
C_W 3 1 Cars Posted October 16, 2006 I've always found too rich makes it swing on idle and more likely stall, and too weak a generally rough idle. Share this post Link to post Share on other sites
