Originally Posted by Doppelgänger
I'm on 2.17 and I have the same thing....sometimes a good smooth idle...sometimes is oscillates and can even stall. Interesting on the NA8 alternator.....any wiring involved with plopping that sucker in? Why does it work? Any tuning needed to go with it?
I believe you change/remove one wire from Hydra, and then turn off alternator control in Hydra.
I think Jeremy has the write-up on FM's site. It's been posted here before, i'll find it.
Got it. It was in one of your past threads. :P
Hydra 2.17 randomly loses power- shuts car off
I should clarify my gross blanket statement i made earlier. I've seen reports that alternator control finally actually works well in 2.7, so if you're on a newer Hydra, give tuning that PWM map a shot. If you're on an older Hydra, up to you. I'm on 2.5, and we're going to give tuning it one more shot, nobody has managed to get it right so far, though. If it doesn't work this time, then i have an NA8 alternator ready to go.
Also: it could very well be something else. I know my ISC settings are garbage which isn't exactly helping anything (i experience the same issues as OP with a/c on), but i also know that some (if not all) of my idling issues are voltage related, the voltage is all over the place. (Radio cuts out when putting windows up from time to time, idle ***** up massively when cooling fan kicks on, etc etc etc)