I tried meticulously to sort this out thru research and fiddling on the car but i just need help.
I bought an 02 wrx about 6 months ago as a project. (not knowing much at all about subarus)
-565cc DW injectors
-silicone tubro inlet
-uncatted up pipe
car has 125k, was giving off codes for maf(found MAF unplugged) and front 02 so i replaced both, but the car still idles funny with MAF plugged in. now monitoring a/f ratios on my AP i notice 25% correction.. showing -8 psi vacuum at idle, when i revv and release throttle it nearly stalls finding idle again(this gets worse when engine is warm). Runs great other than the weird idle. Holds boost well. no codes anymore.. i believe i may have a vacuum leak but can't find it. going to build a tester when i have time and clean iacv. any input would be appreciated.. this car has a lot of potential and is my first subaru, please help