hey guys, i have been searching n reading the past hour nhalf, but no awswer for me yet. I was coming home from work had max ac on on level 2, while i was in slow traffic, i heard a horn type noise for a split second , then i heard it 2 more times, a short time later. I know our cars make noise while ac is on, but when i heard the horn type noise i knew this noise was weird.The ac was still cold btw.
I have kn filter, with xflash, well, going to see it happens tomoorow. when this happened the weather was on the hot side. Just alittle worried what will happen when i bring to stealership.Just frustrated this is new evo 9 with 3000miles

 

any belt issues? maybe serpentine belt tension is iffy and its belt slip under the additional load?
weird though...let us know ifyou find the resolution to the problem

 

will do just gonna see if it will do it again. the weather was pretty hot.