I have a 02 wrx and I'm having idle issues, no matter if it's cold or warm out my idle goes from 1000 to about 1300 and surges sometimes but not all the time and when I shift the RPM's stick for about a second/ a second and a half and when I down shift it keeps back firing till I push the clutch in, I cleaned the MAF and bought a new IACV and I still have the problem


Any advice would be great


Thanks

 

I'd post this in the bay area forum, it gets the most traffic.

I'd check all of your vaccum lines.