hey all, i have an 04 wrx
the car has been great, its now at 90k miles
the car has had an intermittent speedo problem for the last 2 weeks, yesterday the car stalled while sitting at idle
first thought nothing of it, then did it 2 more times at red lights on the way home, then the check engine light came on, i noticed the speedo stopped working totally, rather than being intermittent
ran codes, one was p0502, the speed sensor circuit...
other i forget but was IAC reading low condition
so pulled the IAC and cleaned it, installed a new gasket, seemed stuck in one position, but after cleaning it now spun free
also cleaned the blow off valve out and reoiled it
...ran it for about 30 miles and seemed ok, didnt stall
then got on the highway and it stalled while in 5th gear at 70!! i almost died...seriously...
the rest of the 30 miles home it kept stalling, at red lights, while driving & at all rpm levels and gears
code is back....
any quick ideas on what it could be? should i just replace the entire IAC unit? i cant drive it like this, also i found it was odd the speedo stopped working completely at the same time as all this mess, does it share the same ground as the IAC?
thanks guys, hope i can get to the bottom if this..!!