I just bought an 02 wrx that had a TGV delete, and it has the typical wondering idle for a min then idles normal, but I have codes
P0301 MISFIRE CYLINDER 1
P0302 MISFIRE CYLINDER 2
P0304 MISFIRE CYLINDER 4
P0000 PASS CODE (NO DTC DETECTED)
Would these be from the TGV delete? Or no? Also, the check engine light is NOT flashing, doesnt it always flash if it is a misfire code? Not 100% framilier with it.