achavez

iTrader: (5)

this started 2 days ago. idles perfect without AC on. once AC is switched on starts to drop rpm than goes up to 1100-1200rpm than smooths out for a few seconds than repeats. i have been watching my son than i go to work these last few days so i havent checked anything. i will have time this weekend so i would like some advice what it could be, what to check.
my thoughts are vacuum leak? but why only act up with the AC on.
friend mentioned alternator goin bad? i dont know why this would cause funky idle
boost leak? car doesnt seem to be down in power at all. i dont hear any out of the norm noises.
AC clutch acting up? i popped the hood and noticed during the AC comp cycles when the clutch disengages is when the rpms drop.
i dont have a boost gauge or a/f gauge but i do have romraider. so any ideas what to check out? what to look for in logs?
any and all help is appreciated!!

p.s. car was tuned 3 weeks ago and turbo, intercooler, fuel injectors where changed. but the car has been fine up until 2 days ago

Shayhan27

iTrader: (4)

Hrrm. Im just full of good advice today lol.....

Start wit hthe ABC's hows the air filter?????? When the ac clutch engages the moter gets a load on it and with your new tune which I will assume was done with the AC Off...The Idle was set to certain perameters wit hthe AC off it just takes it a second to compensate so as the clutch engages and disengages the idle fluctuates....

If its really severe take it back to the tuner I am sure whoever it was would be happy to smooth is out for you....

Good luck